/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:39:27,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:39:27,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:39:27,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:39:27,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:39:27,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:39:27,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:39:27,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:39:27,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:39:27,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:39:27,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:39:27,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:39:27,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:39:27,350 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:39:27,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:39:27,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:39:27,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:39:27,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:39:27,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:39:27,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:39:27,353 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:39:27,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:39:27,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:39:27,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:39:27,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:39:27,566 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:39:27,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2022-01-10 06:39:27,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc80af9/2cfdbfa8f7914e0bba5d21f38b74f377/FLAGe4a7753dd [2022-01-10 06:39:27,983 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:39:27,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2022-01-10 06:39:27,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc80af9/2cfdbfa8f7914e0bba5d21f38b74f377/FLAGe4a7753dd [2022-01-10 06:39:28,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc80af9/2cfdbfa8f7914e0bba5d21f38b74f377 [2022-01-10 06:39:28,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:39:28,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:39:28,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:39:28,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:39:28,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:39:28,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f864a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28, skipping insertion in model container [2022-01-10 06:39:28,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:39:28,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:39:28,589 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c[454,467] [2022-01-10 06:39:28,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:39:28,626 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:39:28,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c[454,467] [2022-01-10 06:39:28,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:39:28,658 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:39:28,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28 WrapperNode [2022-01-10 06:39:28,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:39:28,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:39:28,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:39:28,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:39:28,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,682 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-10 06:39:28,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:39:28,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:39:28,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:39:28,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:39:28,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:39:28,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:39:28,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:39:28,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:39:28,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (1/1) ... [2022-01-10 06:39:28,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:39:28,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:39:28,726 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) [2022-01-10 06:39:28,745 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 [2022-01-10 06:39:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:39:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:39:28,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:39:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:39:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 06:39:28,760 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 06:39:28,802 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:39:28,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:39:28,891 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:39:28,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:39:28,896 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:39:28,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:28 BoogieIcfgContainer [2022-01-10 06:39:28,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:39:28,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:39:28,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:39:28,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:39:28,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:39:28" (1/3) ... [2022-01-10 06:39:28,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af696c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:28, skipping insertion in model container [2022-01-10 06:39:28,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:28" (2/3) ... [2022-01-10 06:39:28,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af696c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:28, skipping insertion in model container [2022-01-10 06:39:28,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:28" (3/3) ... [2022-01-10 06:39:28,905 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2022-01-10 06:39:28,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:39:28,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:39:28,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:39:28,948 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=PETRI_NET, 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 [2022-01-10 06:39:28,948 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:39:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:39:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:39:28,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:28,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:28,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-01-10 06:39:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551415714] [2022-01-10 06:39:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:28,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:28,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:28,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:28,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:39:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:39:29,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:39:29,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:29,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551415714] [2022-01-10 06:39:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551415714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:29,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:39:29,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140217312] [2022-01-10 06:39:29,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:29,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:39:29,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:29,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:39:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:29,142 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:39:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:29,179 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 06:39:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:39:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:39:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:29,189 INFO L225 Difference]: With dead ends: 25 [2022-01-10 06:39:29,189 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 06:39:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:39:29,203 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:29,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 06:39:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 06:39:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:39:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 06:39:29,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 06:39:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:29,227 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 06:39:29,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:39:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 06:39:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:39:29,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:29,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:29,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:29,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-01-10 06:39:29,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:29,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76915779] [2022-01-10 06:39:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:29,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:29,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:29,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:29,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:39:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:39:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:39:29,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:39:29,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76915779] [2022-01-10 06:39:29,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76915779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:29,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:29,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:39:29,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835378074] [2022-01-10 06:39:29,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:29,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:39:29,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:39:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:39:29,757 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:39:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:29,793 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 06:39:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:39:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2022-01-10 06:39:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:29,794 INFO L225 Difference]: With dead ends: 22 [2022-01-10 06:39:29,794 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 06:39:29,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:39:29,796 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:29,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 06:39:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 06:39:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:39:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 06:39:29,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 06:39:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 06:39:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:39:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 06:39:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:39:29,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:29,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:29,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:30,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:30,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:30,019 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-01-10 06:39:30,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:30,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090447839] [2022-01-10 06:39:30,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:39:30,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:30,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:30,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:30,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:39:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:39:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:39:30,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:39:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:39:30,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090447839] [2022-01-10 06:39:30,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090447839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:30,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:30,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:39:30,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159517454] [2022-01-10 06:39:30,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:30,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:39:30,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:39:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:39:30,441 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 06:39:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:30,515 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 06:39:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:39:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 22 [2022-01-10 06:39:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:30,516 INFO L225 Difference]: With dead ends: 25 [2022-01-10 06:39:30,516 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 06:39:30,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:39:30,517 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:30,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 06:39:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 06:39:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:39:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 06:39:30,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 06:39:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 06:39:30,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 06:39:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 06:39:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 06:39:30,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:30,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:30,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:30,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:30,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-01-10 06:39:30,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:30,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226173246] [2022-01-10 06:39:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:39:30,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:30,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:30,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:39:30,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:39:30,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:30,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:39:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:39:30,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:39:31,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:31,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226173246] [2022-01-10 06:39:31,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226173246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:31,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:31,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2022-01-10 06:39:31,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244921303] [2022-01-10 06:39:31,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:31,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:39:31,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:39:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:39:31,275 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 06:39:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:31,350 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-10 06:39:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:39:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 28 [2022-01-10 06:39:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:31,352 INFO L225 Difference]: With dead ends: 28 [2022-01-10 06:39:31,352 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 06:39:31,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:39:31,357 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:31,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 86 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 06:39:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 06:39:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:39:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-10 06:39:31,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-10 06:39:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:31,367 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-10 06:39:31,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 06:39:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-10 06:39:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:39:31,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:31,369 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:31,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:31,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-01-10 06:39:31,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:31,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011757959] [2022-01-10 06:39:31,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:39:31,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:31,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:31,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:39:31,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:39:31,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:31,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:39:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:39:31,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:39:32,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011757959] [2022-01-10 06:39:32,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011757959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:32,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:32,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:39:32,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230100230] [2022-01-10 06:39:32,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:32,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:39:32,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:39:32,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:39:32,147 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 06:39:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:32,228 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-10 06:39:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:39:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 34 [2022-01-10 06:39:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:32,230 INFO L225 Difference]: With dead ends: 31 [2022-01-10 06:39:32,230 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:39:32,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:39:32,230 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:32,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 132 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:39:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:39:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:39:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-10 06:39:32,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-10 06:39:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:32,234 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-10 06:39:32,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 06:39:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-10 06:39:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:39:32,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:32,235 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:32,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:39:32,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:32,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-01-10 06:39:32,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047080166] [2022-01-10 06:39:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:39:32,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:32,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:32,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:39:32,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 06:39:32,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:39:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 06:39:32,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:39:33,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:33,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047080166] [2022-01-10 06:39:33,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047080166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:33,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:33,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2022-01-10 06:39:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195690793] [2022-01-10 06:39:33,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:39:33,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:39:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:39:33,129 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 06:39:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:33,235 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-10 06:39:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:39:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 40 [2022-01-10 06:39:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:33,236 INFO L225 Difference]: With dead ends: 34 [2022-01-10 06:39:33,236 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 06:39:33,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:39:33,237 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:33,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 147 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 06:39:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 06:39:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:39:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-10 06:39:33,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-10 06:39:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-10 06:39:33,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 06:39:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-10 06:39:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 06:39:33,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:33,243 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:33,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:33,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:33,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-01-10 06:39:33,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696299602] [2022-01-10 06:39:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:39:33,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:33,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:33,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:39:33,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 06:39:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:39:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 06:39:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:39:34,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696299602] [2022-01-10 06:39:34,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696299602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:34,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:34,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2022-01-10 06:39:34,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424537253] [2022-01-10 06:39:34,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:34,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:39:34,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:39:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:39:34,346 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-10 06:39:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:34,467 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-10 06:39:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:39:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 46 [2022-01-10 06:39:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:34,468 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:39:34,468 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:39:34,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:39:34,469 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:34,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 181 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:39:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 06:39:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:39:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 06:39:34,472 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-10 06:39:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:34,473 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 06:39:34,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-10 06:39:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 06:39:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 06:39:34,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:34,473 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:34,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:34,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:34,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-01-10 06:39:34,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:34,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819684856] [2022-01-10 06:39:34,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:39:34,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:34,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:34,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:34,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:39:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:39:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 06:39:34,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:39:35,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:35,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819684856] [2022-01-10 06:39:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819684856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:35,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:35,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:39:35,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584158685] [2022-01-10 06:39:35,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:39:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:39:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:39:35,761 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 06:39:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:35,895 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 06:39:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:39:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 52 [2022-01-10 06:39:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:35,897 INFO L225 Difference]: With dead ends: 40 [2022-01-10 06:39:35,897 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 06:39:35,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:39:35,898 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:35,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 211 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 06:39:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 06:39:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:39:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 06:39:35,901 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 06:39:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 06:39:35,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 06:39:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 06:39:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:39:35,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:35,902 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:35,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:36,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:36,111 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-01-10 06:39:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:36,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106629403] [2022-01-10 06:39:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:39:36,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:36,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:36,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:39:36,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:39:36,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:39:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 06:39:36,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:39:37,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106629403] [2022-01-10 06:39:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106629403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:37,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:37,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2022-01-10 06:39:37,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995942136] [2022-01-10 06:39:37,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:39:37,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:39:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:39:37,322 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 06:39:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:37,485 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-01-10 06:39:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:39:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 58 [2022-01-10 06:39:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:37,486 INFO L225 Difference]: With dead ends: 43 [2022-01-10 06:39:37,486 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 06:39:37,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:39:37,487 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 167 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:37,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 256 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 06:39:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 06:39:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 06:39:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-01-10 06:39:37,491 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-01-10 06:39:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:37,491 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-01-10 06:39:37,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 06:39:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-01-10 06:39:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 06:39:37,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:37,492 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:37,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:37,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:37,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-01-10 06:39:37,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898598298] [2022-01-10 06:39:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:39:37,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:37,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:37,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:37,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:39:37,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 06:39:37,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:39:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 06:39:37,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 06:39:39,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:39,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898598298] [2022-01-10 06:39:39,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898598298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:39,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:39,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2022-01-10 06:39:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801054700] [2022-01-10 06:39:39,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:39:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:39:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:39:39,067 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-10 06:39:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:39,264 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-01-10 06:39:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:39:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 64 [2022-01-10 06:39:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:39,266 INFO L225 Difference]: With dead ends: 46 [2022-01-10 06:39:39,266 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 06:39:39,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:39:39,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 202 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:39,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 302 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 06:39:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 06:39:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:39:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-10 06:39:39,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-01-10 06:39:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-10 06:39:39,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-10 06:39:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-10 06:39:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:39:39,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:39,275 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:39,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-01-10 06:39:39,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:39,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840857376] [2022-01-10 06:39:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:39:39,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:39,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:39:39,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:39:39,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:39:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-10 06:39:39,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 06:39:41,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840857376] [2022-01-10 06:39:41,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840857376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:41,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:41,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2022-01-10 06:39:41,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445487766] [2022-01-10 06:39:41,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:41,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:39:41,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:39:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:39:41,187 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2022-01-10 06:39:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:41,382 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-01-10 06:39:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:39:41,383 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) Word has length 70 [2022-01-10 06:39:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:41,383 INFO L225 Difference]: With dead ends: 49 [2022-01-10 06:39:41,383 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 06:39:41,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:39:41,384 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:41,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 372 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 06:39:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-10 06:39:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:39:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-10 06:39:41,389 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-01-10 06:39:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:41,389 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-10 06:39:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 11 states have call predecessors, (22), 13 states have call successors, (22) [2022-01-10 06:39:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-10 06:39:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:39:41,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:41,392 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:41,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:39:41,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:41,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-01-10 06:39:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573642685] [2022-01-10 06:39:41,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:39:41,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:41,594 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:41,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:39:41,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-10 06:39:41,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:39:41,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-10 06:39:41,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 06:39:43,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573642685] [2022-01-10 06:39:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573642685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:43,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:43,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2022-01-10 06:39:43,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82457636] [2022-01-10 06:39:43,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:43,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:39:43,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:39:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:39:43,582 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 06:39:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:43,839 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-01-10 06:39:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:39:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 76 [2022-01-10 06:39:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:43,840 INFO L225 Difference]: With dead ends: 52 [2022-01-10 06:39:43,840 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 06:39:43,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:39:43,841 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 316 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:43,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 421 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 06:39:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 06:39:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-01-10 06:39:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-01-10 06:39:43,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-01-10 06:39:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:43,845 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-01-10 06:39:43,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 06:39:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-01-10 06:39:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:39:43,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:43,846 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:43,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:44,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:44,055 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-01-10 06:39:44,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11238009] [2022-01-10 06:39:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:39:44,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:44,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:39:44,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-10 06:39:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:44,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:39:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-10 06:39:44,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 06:39:46,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:46,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11238009] [2022-01-10 06:39:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11238009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:46,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:46,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2022-01-10 06:39:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338289806] [2022-01-10 06:39:46,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 06:39:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 06:39:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:39:46,278 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-10 06:39:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:46,531 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-01-10 06:39:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:39:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) Word has length 82 [2022-01-10 06:39:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:46,532 INFO L225 Difference]: With dead ends: 55 [2022-01-10 06:39:46,532 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 06:39:46,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 06:39:46,533 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:46,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 499 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 06:39:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-10 06:39:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 06:39:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-01-10 06:39:46,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-01-10 06:39:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:46,537 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-01-10 06:39:46,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-10 06:39:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-01-10 06:39:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:39:46,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:46,538 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:46,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:46,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:46,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-01-10 06:39:46,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:46,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386065586] [2022-01-10 06:39:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:39:46,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:46,747 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:39:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:39:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-01-10 06:39:47,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 06:39:49,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:49,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386065586] [2022-01-10 06:39:49,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386065586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:49,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:49,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 33 [2022-01-10 06:39:49,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722503174] [2022-01-10 06:39:49,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:49,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-10 06:39:49,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:49,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-10 06:39:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:39:49,295 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 06:39:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:49,530 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-01-10 06:39:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:39:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) Word has length 88 [2022-01-10 06:39:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:49,532 INFO L225 Difference]: With dead ends: 58 [2022-01-10 06:39:49,532 INFO L226 Difference]: Without dead ends: 54 [2022-01-10 06:39:49,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 06:39:49,533 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:49,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 561 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-10 06:39:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-10 06:39:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:39:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-01-10 06:39:49,550 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-01-10 06:39:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:49,551 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-01-10 06:39:49,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 06:39:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-01-10 06:39:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:39:49,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:49,553 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:49,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:39:49,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:49,759 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-01-10 06:39:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:49,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602982462] [2022-01-10 06:39:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:39:49,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:49,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:49,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:39:49,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:39:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 06:39:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-01-10 06:39:50,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 06:39:52,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602982462] [2022-01-10 06:39:52,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602982462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:52,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:52,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 35 [2022-01-10 06:39:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454903431] [2022-01-10 06:39:52,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:52,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:39:52,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:39:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:39:52,716 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2022-01-10 06:39:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:53,041 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-01-10 06:39:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 06:39:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) Word has length 94 [2022-01-10 06:39:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:53,042 INFO L225 Difference]: With dead ends: 61 [2022-01-10 06:39:53,042 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 06:39:53,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 06:39:53,043 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 132 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:53,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 612 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:39:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 06:39:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-10 06:39:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:39:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-01-10 06:39:53,046 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-01-10 06:39:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:53,047 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-01-10 06:39:53,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2022-01-10 06:39:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-01-10 06:39:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:39:53,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:53,047 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:53,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:53,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:53,248 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-01-10 06:39:53,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:53,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881925653] [2022-01-10 06:39:53,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:39:53,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:53,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:53,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:39:53,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-10 06:39:53,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:53,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 06:39:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 06:39:53,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-10 06:39:56,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:56,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881925653] [2022-01-10 06:39:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881925653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:56,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:56,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 37 [2022-01-10 06:39:56,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747627620] [2022-01-10 06:39:56,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:56,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:39:56,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:39:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:39:56,646 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2022-01-10 06:39:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:57,032 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-01-10 06:39:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:39:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) Word has length 100 [2022-01-10 06:39:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:57,033 INFO L225 Difference]: With dead ends: 64 [2022-01-10 06:39:57,033 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 06:39:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 153 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=424, Invalid=2332, Unknown=0, NotChecked=0, Total=2756 [2022-01-10 06:39:57,034 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 446 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:57,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 702 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:39:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 06:39:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 06:39:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:39:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-01-10 06:39:57,038 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2022-01-10 06:39:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:57,038 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-01-10 06:39:57,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2022-01-10 06:39:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-01-10 06:39:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 06:39:57,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:57,039 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:57,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:57,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:57,246 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:57,246 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2022-01-10 06:39:57,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:57,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219561025] [2022-01-10 06:39:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:39:57,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:57,247 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:39:57,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:39:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 06:39:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-01-10 06:39:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 06:40:00,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:00,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219561025] [2022-01-10 06:40:00,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219561025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:00,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:00,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 39 [2022-01-10 06:40:00,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126609923] [2022-01-10 06:40:00,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:00,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 06:40:00,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 06:40:00,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:40:00,693 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2022-01-10 06:40:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:01,093 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-01-10 06:40:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:40:01,094 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) Word has length 106 [2022-01-10 06:40:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:01,097 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:40:01,097 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 06:40:01,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 165 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=2613, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 06:40:01,100 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 331 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:01,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 750 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 06:40:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 06:40:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:40:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-01-10 06:40:01,119 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2022-01-10 06:40:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:01,120 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-01-10 06:40:01,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2022-01-10 06:40:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-01-10 06:40:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:40:01,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:01,121 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:01,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:01,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:01,328 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2022-01-10 06:40:01,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217346511] [2022-01-10 06:40:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:40:01,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:01,329 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:01,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:40:01,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-01-10 06:40:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 06:40:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-01-10 06:40:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-10 06:40:05,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217346511] [2022-01-10 06:40:05,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217346511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:05,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:05,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 41 [2022-01-10 06:40:05,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245053355] [2022-01-10 06:40:05,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:05,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:40:05,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:40:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:40:05,363 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2022-01-10 06:40:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:05,682 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-01-10 06:40:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:40:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) Word has length 112 [2022-01-10 06:40:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:05,683 INFO L225 Difference]: With dead ends: 70 [2022-01-10 06:40:05,683 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:40:05,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=512, Invalid=2910, Unknown=0, NotChecked=0, Total=3422 [2022-01-10 06:40:05,685 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 197 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:05,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 816 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:40:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:40:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-10 06:40:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:40:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-01-10 06:40:05,687 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2022-01-10 06:40:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-01-10 06:40:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2022-01-10 06:40:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-01-10 06:40:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 06:40:05,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:05,688 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:05,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:05,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2022-01-10 06:40:05,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:05,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879636891] [2022-01-10 06:40:05,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:40:05,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:05,891 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:05,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:40:06,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-01-10 06:40:06,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-10 06:40:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-01-10 06:40:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-01-10 06:40:09,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879636891] [2022-01-10 06:40:09,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879636891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:09,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:09,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 43 [2022-01-10 06:40:09,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773380760] [2022-01-10 06:40:09,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:09,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 06:40:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 06:40:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:40:09,841 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) [2022-01-10 06:40:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:10,261 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-01-10 06:40:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:40:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) Word has length 118 [2022-01-10 06:40:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:10,263 INFO L225 Difference]: With dead ends: 73 [2022-01-10 06:40:10,263 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 06:40:10,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=559, Invalid=3223, Unknown=0, NotChecked=0, Total=3782 [2022-01-10 06:40:10,264 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 327 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:10,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 901 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 06:40:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-01-10 06:40:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2022-01-10 06:40:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-01-10 06:40:10,268 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2022-01-10 06:40:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:10,269 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-01-10 06:40:10,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (38), 19 states have call predecessors, (38), 21 states have call successors, (38) [2022-01-10 06:40:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-01-10 06:40:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:40:10,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:10,270 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:10,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:10,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:10,478 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:10,478 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2022-01-10 06:40:10,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:10,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568276769] [2022-01-10 06:40:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:40:10,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:10,488 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:10,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:40:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 06:40:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-01-10 06:40:10,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-01-10 06:40:14,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568276769] [2022-01-10 06:40:14,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568276769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:14,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:14,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 45 [2022-01-10 06:40:14,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612326924] [2022-01-10 06:40:14,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:14,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-10 06:40:14,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-10 06:40:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 06:40:14,973 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (40), 20 states have call predecessors, (40), 22 states have call successors, (40) [2022-01-10 06:40:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:15,400 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-01-10 06:40:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:40:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (40), 20 states have call predecessors, (40), 22 states have call successors, (40) Word has length 124 [2022-01-10 06:40:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:15,402 INFO L225 Difference]: With dead ends: 76 [2022-01-10 06:40:15,402 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 06:40:15,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 193 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=3552, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 06:40:15,403 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 343 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:15,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 985 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 06:40:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-10 06:40:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-01-10 06:40:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-01-10 06:40:15,408 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2022-01-10 06:40:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:15,408 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-01-10 06:40:15,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (40), 20 states have call predecessors, (40), 22 states have call successors, (40) [2022-01-10 06:40:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-01-10 06:40:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 06:40:15,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:15,409 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:15,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:15,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:15,616 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2022-01-10 06:40:15,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:15,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620434196] [2022-01-10 06:40:15,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:40:15,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:15,618 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:15,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:40:15,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:40:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-10 06:40:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-01-10 06:40:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-01-10 06:40:20,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620434196] [2022-01-10 06:40:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620434196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:20,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:20,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 47 [2022-01-10 06:40:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721150491] [2022-01-10 06:40:20,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:20,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 06:40:20,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:20,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 06:40:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 06:40:20,250 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) [2022-01-10 06:40:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:20,819 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-01-10 06:40:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 06:40:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) Word has length 130 [2022-01-10 06:40:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:20,823 INFO L225 Difference]: With dead ends: 79 [2022-01-10 06:40:20,824 INFO L226 Difference]: Without dead ends: 75 [2022-01-10 06:40:20,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=659, Invalid=3897, Unknown=0, NotChecked=0, Total=4556 [2022-01-10 06:40:20,825 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:20,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1073 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:40:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-10 06:40:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-01-10 06:40:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-01-10 06:40:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-01-10 06:40:20,835 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2022-01-10 06:40:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:20,835 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-01-10 06:40:20,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) [2022-01-10 06:40:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-01-10 06:40:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:40:20,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:20,836 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:21,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:21,043 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2022-01-10 06:40:21,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127360641] [2022-01-10 06:40:21,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:40:21,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:21,045 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:21,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:40:21,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-01-10 06:40:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-10 06:40:21,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-10 06:40:21,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 06:40:25,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127360641] [2022-01-10 06:40:25,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127360641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:25,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:25,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 49 [2022-01-10 06:40:25,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657659904] [2022-01-10 06:40:25,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:25,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-10 06:40:25,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-10 06:40:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:40:25,311 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (44), 22 states have call predecessors, (44), 24 states have call successors, (44) [2022-01-10 06:40:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:25,835 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-01-10 06:40:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 06:40:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (44), 22 states have call predecessors, (44), 24 states have call successors, (44) Word has length 136 [2022-01-10 06:40:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:25,837 INFO L225 Difference]: With dead ends: 82 [2022-01-10 06:40:25,837 INFO L226 Difference]: Without dead ends: 78 [2022-01-10 06:40:25,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 213 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-01-10 06:40:25,841 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 697 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:25,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1160 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:40:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-10 06:40:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-01-10 06:40:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2022-01-10 06:40:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-01-10 06:40:25,845 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2022-01-10 06:40:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-01-10 06:40:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (44), 22 states have call predecessors, (44), 24 states have call successors, (44) [2022-01-10 06:40:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-01-10 06:40:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-10 06:40:25,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:25,846 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:25,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:26,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:26,054 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2022-01-10 06:40:26,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:26,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288371712] [2022-01-10 06:40:26,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:40:26,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:26,056 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:26,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:40:26,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:40:26,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 06:40:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-01-10 06:40:26,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-10 06:40:30,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288371712] [2022-01-10 06:40:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288371712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:30,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:30,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 51 [2022-01-10 06:40:30,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602035954] [2022-01-10 06:40:30,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:30,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-10 06:40:30,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-10 06:40:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 06:40:30,580 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2022-01-10 06:40:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:30,971 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-01-10 06:40:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:40:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) Word has length 142 [2022-01-10 06:40:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:30,975 INFO L225 Difference]: With dead ends: 85 [2022-01-10 06:40:30,975 INFO L226 Difference]: Without dead ends: 81 [2022-01-10 06:40:30,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=4635, Unknown=0, NotChecked=0, Total=5402 [2022-01-10 06:40:30,979 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 100 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:30,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1314 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-10 06:40:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-10 06:40:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-01-10 06:40:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-01-10 06:40:30,982 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2022-01-10 06:40:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:30,982 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-01-10 06:40:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2022-01-10 06:40:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-01-10 06:40:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 06:40:30,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:30,983 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:30,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:31,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:31,192 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2022-01-10 06:40:31,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110952718] [2022-01-10 06:40:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:40:31,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:31,194 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:31,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:40:31,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-10 06:40:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 06:40:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-01-10 06:40:31,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-01-10 06:40:37,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:37,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110952718] [2022-01-10 06:40:37,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110952718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:37,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:37,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 53 [2022-01-10 06:40:37,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008714371] [2022-01-10 06:40:37,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:37,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-10 06:40:37,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-10 06:40:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-01-10 06:40:37,858 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (48), 24 states have call predecessors, (48), 26 states have call successors, (48) [2022-01-10 06:40:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:38,532 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-01-10 06:40:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:40:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (48), 24 states have call predecessors, (48), 26 states have call successors, (48) Word has length 148 [2022-01-10 06:40:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:38,533 INFO L225 Difference]: With dead ends: 88 [2022-01-10 06:40:38,533 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 06:40:38,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 231 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=824, Invalid=5028, Unknown=0, NotChecked=0, Total=5852 [2022-01-10 06:40:38,534 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 454 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:38,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 1416 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:40:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 06:40:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-10 06:40:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2022-01-10 06:40:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-01-10 06:40:38,538 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2022-01-10 06:40:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:38,538 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-01-10 06:40:38,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (48), 24 states have call predecessors, (48), 26 states have call successors, (48) [2022-01-10 06:40:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-01-10 06:40:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-10 06:40:38,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:38,539 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:38,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:40:38,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:38,745 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2022-01-10 06:40:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744205477] [2022-01-10 06:40:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:40:38,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:38,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:38,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:40:39,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-01-10 06:40:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:39,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-10 06:40:39,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-01-10 06:40:39,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-10 06:40:44,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744205477] [2022-01-10 06:40:44,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744205477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:44,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:44,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 55 [2022-01-10 06:40:44,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649115599] [2022-01-10 06:40:44,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:44,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-10 06:40:44,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-10 06:40:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 06:40:44,812 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (50), 25 states have call predecessors, (50), 27 states have call successors, (50) [2022-01-10 06:40:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:45,319 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-01-10 06:40:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 06:40:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (50), 25 states have call predecessors, (50), 27 states have call successors, (50) Word has length 154 [2022-01-10 06:40:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:45,320 INFO L225 Difference]: With dead ends: 91 [2022-01-10 06:40:45,320 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 06:40:45,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 241 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=883, Invalid=5437, Unknown=0, NotChecked=0, Total=6320 [2022-01-10 06:40:45,321 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 576 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:45,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1522 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:40:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 06:40:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-01-10 06:40:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-01-10 06:40:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-01-10 06:40:45,324 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2022-01-10 06:40:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:45,324 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-01-10 06:40:45,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (50), 25 states have call predecessors, (50), 27 states have call successors, (50) [2022-01-10 06:40:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-01-10 06:40:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 06:40:45,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:45,330 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:45,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:45,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:45,535 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2022-01-10 06:40:45,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:45,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972702743] [2022-01-10 06:40:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:40:45,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:45,537 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:45,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:40:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 06:40:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-01-10 06:40:46,945 INFO L328 TraceCheckSpWp]: Computing backward predicates...