/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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:48:33,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:48:33,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:48:34,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:48:34,078 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 05:48:34,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:48:34,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:48:34,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:48:34,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:48:34,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:48:34,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:48:34,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:48:34,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:48:34,112 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:48:34,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:48:34,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:48:34,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:48:34,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:48:34,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:48:34,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:48:34,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:48:34,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:48:34,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:48:34,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:48:34,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:48:34,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:48:34,369 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:48:34,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2022-01-10 05:48:34,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b340d5a/610fb2df2a8a4c35889a08fafd538271/FLAGf74408d6b [2022-01-10 05:48:34,839 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:48:34,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2022-01-10 05:48:34,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b340d5a/610fb2df2a8a4c35889a08fafd538271/FLAGf74408d6b [2022-01-10 05:48:35,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b340d5a/610fb2df2a8a4c35889a08fafd538271 [2022-01-10 05:48:35,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:48:35,214 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:48:35,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:48:35,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:48:35,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:48:35,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248f18c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35, skipping insertion in model container [2022-01-10 05:48:35,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:48:35,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:48:35,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c[24818,24831] [2022-01-10 05:48:35,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:48:35,506 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:48:35,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c[24818,24831] [2022-01-10 05:48:35,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:48:35,575 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:48:35,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35 WrapperNode [2022-01-10 05:48:35,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:48:35,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:48:35,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:48:35,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:48:35,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,654 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 377 [2022-01-10 05:48:35,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:48:35,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:48:35,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:48:35,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:48:35,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:48:35,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:48:35,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:48:35,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:48:35,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (1/1) ... [2022-01-10 05:48:35,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:48:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:48:35,759 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 05:48:35,780 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 05:48:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:48:35,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:48:35,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:48:35,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:48:35,897 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:48:35,898 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:48:36,474 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:48:36,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:48:36,481 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 05:48:36,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:48:36 BoogieIcfgContainer [2022-01-10 05:48:36,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:48:36,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:48:36,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:48:36,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:48:36,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:48:35" (1/3) ... [2022-01-10 05:48:36,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e5aebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:48:36, skipping insertion in model container [2022-01-10 05:48:36,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:48:35" (2/3) ... [2022-01-10 05:48:36,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e5aebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:48:36, skipping insertion in model container [2022-01-10 05:48:36,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:48:36" (3/3) ... [2022-01-10 05:48:36,498 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2022-01-10 05:48:36,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:48:36,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:48:36,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:48:36,555 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 05:48:36,556 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:48:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.9537037037037037) internal successors, (211), 109 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 05:48:36,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:36,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:36,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1895078531, now seen corresponding path program 1 times [2022-01-10 05:48:36,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557102868] [2022-01-10 05:48:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:36,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:36,595 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 05:48:36,598 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 05:48:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 05:48:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:36,723 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 05:48:36,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:36,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557102868] [2022-01-10 05:48:36,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557102868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:36,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:36,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:48:36,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944434225] [2022-01-10 05:48:36,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:36,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 05:48:36,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 05:48:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 05:48:36,768 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.9537037037037037) internal successors, (211), 109 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:36,809 INFO L93 Difference]: Finished difference Result 218 states and 420 transitions. [2022-01-10 05:48:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 05:48:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 05:48:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:36,822 INFO L225 Difference]: With dead ends: 218 [2022-01-10 05:48:36,822 INFO L226 Difference]: Without dead ends: 106 [2022-01-10 05:48:36,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 05:48:36,828 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:36,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-10 05:48:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-10 05:48:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.6857142857142857) internal successors, (177), 105 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 177 transitions. [2022-01-10 05:48:36,857 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 177 transitions. Word has length 10 [2022-01-10 05:48:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:36,858 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 177 transitions. [2022-01-10 05:48:36,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 177 transitions. [2022-01-10 05:48:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 05:48:36,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:36,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:36,868 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 05:48:37,059 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 05:48:37,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1914595175, now seen corresponding path program 1 times [2022-01-10 05:48:37,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295640882] [2022-01-10 05:48:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:37,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:37,063 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 05:48:37,065 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 05:48:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:37,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:37,131 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 05:48:37,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:37,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:37,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295640882] [2022-01-10 05:48:37,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295640882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:37,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:37,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:37,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647676828] [2022-01-10 05:48:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:37,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:37,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:37,135 INFO L87 Difference]: Start difference. First operand 106 states and 177 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:37,172 INFO L93 Difference]: Finished difference Result 214 states and 358 transitions. [2022-01-10 05:48:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 05:48:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:37,175 INFO L225 Difference]: With dead ends: 214 [2022-01-10 05:48:37,175 INFO L226 Difference]: Without dead ends: 110 [2022-01-10 05:48:37,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:37,176 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 5 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:37,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 332 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-10 05:48:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-01-10 05:48:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.6697247706422018) internal successors, (182), 109 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 182 transitions. [2022-01-10 05:48:37,185 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 182 transitions. Word has length 11 [2022-01-10 05:48:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 182 transitions. [2022-01-10 05:48:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 182 transitions. [2022-01-10 05:48:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 05:48:37,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:37,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:37,201 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 05:48:37,404 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 05:48:37,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash 100490260, now seen corresponding path program 1 times [2022-01-10 05:48:37,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092646294] [2022-01-10 05:48:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:37,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:37,408 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 05:48:37,410 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 05:48:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 05:48:37,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:37,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:37,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092646294] [2022-01-10 05:48:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092646294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:37,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:37,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 05:48:37,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864887148] [2022-01-10 05:48:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:37,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:48:37,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:48:37,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:37,633 INFO L87 Difference]: Start difference. First operand 110 states and 182 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:37,897 INFO L93 Difference]: Finished difference Result 326 states and 541 transitions. [2022-01-10 05:48:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:48:37,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 05:48:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:37,900 INFO L225 Difference]: With dead ends: 326 [2022-01-10 05:48:37,900 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 05:48:37,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:37,902 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 133 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:37,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 395 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 05:48:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 05:48:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2022-01-10 05:48:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.644808743169399) internal successors, (301), 183 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2022-01-10 05:48:37,918 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 17 [2022-01-10 05:48:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:37,919 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2022-01-10 05:48:37,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2022-01-10 05:48:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 05:48:37,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:37,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:37,936 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 05:48:38,129 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 05:48:38,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1571478032, now seen corresponding path program 1 times [2022-01-10 05:48:38,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612442852] [2022-01-10 05:48:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:38,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:38,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:38,132 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 05:48:38,135 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 05:48:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:38,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:38,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612442852] [2022-01-10 05:48:38,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612442852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:38,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:38,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:38,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404374177] [2022-01-10 05:48:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:38,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:38,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:38,225 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:38,265 INFO L93 Difference]: Finished difference Result 314 states and 514 transitions. [2022-01-10 05:48:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 05:48:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:38,268 INFO L225 Difference]: With dead ends: 314 [2022-01-10 05:48:38,268 INFO L226 Difference]: Without dead ends: 133 [2022-01-10 05:48:38,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:38,280 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 33 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:38,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 307 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-10 05:48:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-01-10 05:48:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.623076923076923) internal successors, (211), 130 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 211 transitions. [2022-01-10 05:48:38,294 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 211 transitions. Word has length 18 [2022-01-10 05:48:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 211 transitions. [2022-01-10 05:48:38,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 211 transitions. [2022-01-10 05:48:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 05:48:38,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:38,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:38,311 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 05:48:38,496 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 05:48:38,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1260642915, now seen corresponding path program 1 times [2022-01-10 05:48:38,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:38,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488531329] [2022-01-10 05:48:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:38,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:38,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:38,499 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 05:48:38,501 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 05:48:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:38,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 05:48:38,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:38,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488531329] [2022-01-10 05:48:38,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488531329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:38,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:38,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:38,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844272125] [2022-01-10 05:48:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:38,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:38,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:38,600 INFO L87 Difference]: Start difference. First operand 131 states and 211 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:38,629 INFO L93 Difference]: Finished difference Result 267 states and 431 transitions. [2022-01-10 05:48:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 05:48:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:38,630 INFO L225 Difference]: With dead ends: 267 [2022-01-10 05:48:38,630 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 05:48:38,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:38,632 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 35 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:38,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 306 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 05:48:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-01-10 05:48:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.6029411764705883) internal successors, (218), 136 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 218 transitions. [2022-01-10 05:48:38,650 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 218 transitions. Word has length 24 [2022-01-10 05:48:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:38,651 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 218 transitions. [2022-01-10 05:48:38,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 218 transitions. [2022-01-10 05:48:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 05:48:38,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:38,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:38,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 05:48:38,861 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 05:48:38,861 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1813922334, now seen corresponding path program 1 times [2022-01-10 05:48:38,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:38,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313911219] [2022-01-10 05:48:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:38,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:38,865 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 05:48:38,865 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 05:48:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 05:48:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:38,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:39,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313911219] [2022-01-10 05:48:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313911219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:39,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:39,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 05:48:39,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22179704] [2022-01-10 05:48:39,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:39,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 05:48:39,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:39,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 05:48:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 05:48:39,271 INFO L87 Difference]: Start difference. First operand 137 states and 218 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:39,491 INFO L93 Difference]: Finished difference Result 308 states and 484 transitions. [2022-01-10 05:48:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 05:48:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 05:48:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:39,493 INFO L225 Difference]: With dead ends: 308 [2022-01-10 05:48:39,493 INFO L226 Difference]: Without dead ends: 170 [2022-01-10 05:48:39,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 05:48:39,494 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 77 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:39,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 677 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-01-10 05:48:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-10 05:48:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2022-01-10 05:48:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5759493670886076) internal successors, (249), 158 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 249 transitions. [2022-01-10 05:48:39,499 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 249 transitions. Word has length 26 [2022-01-10 05:48:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:39,500 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 249 transitions. [2022-01-10 05:48:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 249 transitions. [2022-01-10 05:48:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 05:48:39,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:39,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:39,511 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 05:48:39,710 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 05:48:39,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash 408461028, now seen corresponding path program 1 times [2022-01-10 05:48:39,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:39,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173920363] [2022-01-10 05:48:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:39,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:39,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:39,712 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 05:48:39,714 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 05:48:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:48:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:39,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:40,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173920363] [2022-01-10 05:48:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173920363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:40,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:40,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 05:48:40,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5414390] [2022-01-10 05:48:40,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 05:48:40,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 05:48:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 05:48:40,024 INFO L87 Difference]: Start difference. First operand 159 states and 249 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:40,139 INFO L93 Difference]: Finished difference Result 167 states and 255 transitions. [2022-01-10 05:48:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 05:48:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 05:48:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:40,141 INFO L225 Difference]: With dead ends: 167 [2022-01-10 05:48:40,141 INFO L226 Difference]: Without dead ends: 164 [2022-01-10 05:48:40,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 05:48:40,142 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 53 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:40,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 605 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-10 05:48:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-01-10 05:48:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 159 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 249 transitions. [2022-01-10 05:48:40,148 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 249 transitions. Word has length 27 [2022-01-10 05:48:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:40,148 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 249 transitions. [2022-01-10 05:48:40,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 249 transitions. [2022-01-10 05:48:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 05:48:40,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:40,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:40,159 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 05:48:40,358 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 05:48:40,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -895020851, now seen corresponding path program 1 times [2022-01-10 05:48:40,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687870529] [2022-01-10 05:48:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:40,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:40,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:40,362 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 05:48:40,362 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 05:48:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 05:48:40,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:40,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687870529] [2022-01-10 05:48:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687870529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:40,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:40,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641410889] [2022-01-10 05:48:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:40,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:40,469 INFO L87 Difference]: Start difference. First operand 160 states and 249 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:40,498 INFO L93 Difference]: Finished difference Result 322 states and 504 transitions. [2022-01-10 05:48:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-10 05:48:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:40,502 INFO L225 Difference]: With dead ends: 322 [2022-01-10 05:48:40,502 INFO L226 Difference]: Without dead ends: 169 [2022-01-10 05:48:40,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:40,503 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 36 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:40,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 306 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-10 05:48:40,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-01-10 05:48:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5481927710843373) internal successors, (257), 166 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 257 transitions. [2022-01-10 05:48:40,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 257 transitions. Word has length 34 [2022-01-10 05:48:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:40,510 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 257 transitions. [2022-01-10 05:48:40,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 257 transitions. [2022-01-10 05:48:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 05:48:40,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:40,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:40,525 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 05:48:40,723 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 05:48:40,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -936850633, now seen corresponding path program 1 times [2022-01-10 05:48:40,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188770198] [2022-01-10 05:48:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:40,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:40,725 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 05:48:40,726 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 05:48:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:40,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:48:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 05:48:40,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 05:48:41,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188770198] [2022-01-10 05:48:41,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188770198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:41,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:41,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 05:48:41,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315627904] [2022-01-10 05:48:41,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:41,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 05:48:41,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 05:48:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 05:48:41,155 INFO L87 Difference]: Start difference. First operand 167 states and 257 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:41,388 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2022-01-10 05:48:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 05:48:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 05:48:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:41,390 INFO L225 Difference]: With dead ends: 362 [2022-01-10 05:48:41,390 INFO L226 Difference]: Without dead ends: 198 [2022-01-10 05:48:41,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 05:48:41,391 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 69 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:41,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 814 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-10 05:48:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-10 05:48:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2022-01-10 05:48:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5351351351351352) internal successors, (284), 185 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 284 transitions. [2022-01-10 05:48:41,396 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 284 transitions. Word has length 37 [2022-01-10 05:48:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 284 transitions. [2022-01-10 05:48:41,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 284 transitions. [2022-01-10 05:48:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 05:48:41,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:41,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:41,411 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 05:48:41,598 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 05:48:41,598 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1033847947, now seen corresponding path program 1 times [2022-01-10 05:48:41,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:41,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889902701] [2022-01-10 05:48:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:41,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:41,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:41,600 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 05:48:41,602 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 05:48:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 05:48:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 05:48:41,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 05:48:41,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889902701] [2022-01-10 05:48:41,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889902701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:41,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:41,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-01-10 05:48:41,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906109155] [2022-01-10 05:48:41,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:48:41,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:48:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:41,816 INFO L87 Difference]: Start difference. First operand 186 states and 284 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:41,941 INFO L93 Difference]: Finished difference Result 312 states and 484 transitions. [2022-01-10 05:48:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:48:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 05:48:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:41,943 INFO L225 Difference]: With dead ends: 312 [2022-01-10 05:48:41,944 INFO L226 Difference]: Without dead ends: 284 [2022-01-10 05:48:41,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:41,944 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 292 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:41,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 566 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-10 05:48:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 276. [2022-01-10 05:48:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.530909090909091) internal successors, (421), 275 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 421 transitions. [2022-01-10 05:48:41,952 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 421 transitions. Word has length 38 [2022-01-10 05:48:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:41,953 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 421 transitions. [2022-01-10 05:48:41,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 421 transitions. [2022-01-10 05:48:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 05:48:41,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:41,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:41,965 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 05:48:42,167 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 05:48:42,168 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1756734972, now seen corresponding path program 1 times [2022-01-10 05:48:42,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:42,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851759215] [2022-01-10 05:48:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:42,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:42,170 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 05:48:42,171 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 05:48:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:48:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:42,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:42,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:42,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851759215] [2022-01-10 05:48:42,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851759215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:42,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:42,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 05:48:42,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291997454] [2022-01-10 05:48:42,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:42,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 05:48:42,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 05:48:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 05:48:42,808 INFO L87 Difference]: Start difference. First operand 276 states and 421 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:42,896 INFO L93 Difference]: Finished difference Result 279 states and 424 transitions. [2022-01-10 05:48:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 05:48:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 05:48:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:42,899 INFO L225 Difference]: With dead ends: 279 [2022-01-10 05:48:42,899 INFO L226 Difference]: Without dead ends: 277 [2022-01-10 05:48:42,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 05:48:42,900 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 63 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:42,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 895 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-01-10 05:48:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-10 05:48:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-01-10 05:48:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.5289855072463767) internal successors, (422), 276 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 422 transitions. [2022-01-10 05:48:42,923 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 422 transitions. Word has length 40 [2022-01-10 05:48:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 422 transitions. [2022-01-10 05:48:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 422 transitions. [2022-01-10 05:48:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 05:48:42,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:42,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:42,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 05:48:43,124 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 05:48:43,125 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1392484683, now seen corresponding path program 1 times [2022-01-10 05:48:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008698742] [2022-01-10 05:48:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:43,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:43,127 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 05:48:43,127 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 05:48:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 05:48:43,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:43,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:43,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008698742] [2022-01-10 05:48:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008698742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:43,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:43,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:43,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273330780] [2022-01-10 05:48:43,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:43,248 INFO L87 Difference]: Start difference. First operand 277 states and 422 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:43,276 INFO L93 Difference]: Finished difference Result 424 states and 638 transitions. [2022-01-10 05:48:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 05:48:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:43,278 INFO L225 Difference]: With dead ends: 424 [2022-01-10 05:48:43,278 INFO L226 Difference]: Without dead ends: 154 [2022-01-10 05:48:43,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:43,279 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 31 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:43,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 202 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-10 05:48:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-10 05:48:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 151 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2022-01-10 05:48:43,284 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 47 [2022-01-10 05:48:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:43,285 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2022-01-10 05:48:43,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2022-01-10 05:48:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 05:48:43,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:43,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:43,297 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 05:48:43,495 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 05:48:43,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -608000180, now seen corresponding path program 1 times [2022-01-10 05:48:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543862822] [2022-01-10 05:48:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:43,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:43,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:43,497 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 05:48:43,498 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 05:48:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 05:48:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 05:48:43,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 05:48:43,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543862822] [2022-01-10 05:48:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543862822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:43,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:43,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 05:48:43,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562486129] [2022-01-10 05:48:43,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:43,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:48:43,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:48:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:48:43,818 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:43,958 INFO L93 Difference]: Finished difference Result 370 states and 542 transitions. [2022-01-10 05:48:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 05:48:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-01-10 05:48:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:43,960 INFO L225 Difference]: With dead ends: 370 [2022-01-10 05:48:43,960 INFO L226 Difference]: Without dead ends: 271 [2022-01-10 05:48:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:48:43,961 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 295 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 948 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-10 05:48:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2022-01-10 05:48:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.441509433962264) internal successors, (382), 265 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 382 transitions. [2022-01-10 05:48:43,968 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 382 transitions. Word has length 52 [2022-01-10 05:48:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:43,969 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 382 transitions. [2022-01-10 05:48:43,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 382 transitions. [2022-01-10 05:48:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 05:48:43,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:43,969 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:43,978 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 05:48:44,170 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 05:48:44,170 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1903289774, now seen corresponding path program 1 times [2022-01-10 05:48:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:44,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614679940] [2022-01-10 05:48:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:44,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:44,172 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 05:48:44,173 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 05:48:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 05:48:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:44,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:44,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614679940] [2022-01-10 05:48:44,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614679940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:44,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 05:48:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901311976] [2022-01-10 05:48:44,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:44,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 05:48:44,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 05:48:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-10 05:48:44,833 INFO L87 Difference]: Start difference. First operand 266 states and 382 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:45,031 INFO L93 Difference]: Finished difference Result 339 states and 480 transitions. [2022-01-10 05:48:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 05:48:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-10 05:48:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:45,033 INFO L225 Difference]: With dead ends: 339 [2022-01-10 05:48:45,033 INFO L226 Difference]: Without dead ends: 335 [2022-01-10 05:48:45,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 05:48:45,034 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 153 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:45,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 855 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-10 05:48:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 327. [2022-01-10 05:48:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4355828220858895) internal successors, (468), 326 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 468 transitions. [2022-01-10 05:48:45,046 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 468 transitions. Word has length 56 [2022-01-10 05:48:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:45,047 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 468 transitions. [2022-01-10 05:48:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 468 transitions. [2022-01-10 05:48:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 05:48:45,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:45,048 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:45,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 05:48:45,257 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 05:48:45,257 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1029731011, now seen corresponding path program 1 times [2022-01-10 05:48:45,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:45,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645282572] [2022-01-10 05:48:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:45,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:45,260 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 05:48:45,262 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 05:48:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 05:48:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:45,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 05:48:46,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645282572] [2022-01-10 05:48:46,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645282572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:46,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:46,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-01-10 05:48:46,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999208575] [2022-01-10 05:48:46,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:46,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 05:48:46,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 05:48:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-10 05:48:46,860 INFO L87 Difference]: Start difference. First operand 327 states and 468 transitions. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:47,143 INFO L93 Difference]: Finished difference Result 425 states and 600 transitions. [2022-01-10 05:48:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 05:48:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 05:48:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:47,146 INFO L225 Difference]: With dead ends: 425 [2022-01-10 05:48:47,146 INFO L226 Difference]: Without dead ends: 423 [2022-01-10 05:48:47,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:47,147 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 232 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:47,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1202 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-10 05:48:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-10 05:48:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 404. [2022-01-10 05:48:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.4416873449131513) internal successors, (581), 403 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 581 transitions. [2022-01-10 05:48:47,161 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 581 transitions. Word has length 63 [2022-01-10 05:48:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:47,162 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 581 transitions. [2022-01-10 05:48:47,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 581 transitions. [2022-01-10 05:48:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 05:48:47,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:47,162 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:47,171 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 05:48:47,371 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 05:48:47,372 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 924550293, now seen corresponding path program 1 times [2022-01-10 05:48:47,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:47,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776314170] [2022-01-10 05:48:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:47,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:47,374 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 05:48:47,376 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 05:48:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:48:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 05:48:47,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 05:48:47,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:47,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776314170] [2022-01-10 05:48:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776314170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:47,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 05:48:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678347176] [2022-01-10 05:48:47,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 05:48:47,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 05:48:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-10 05:48:47,798 INFO L87 Difference]: Start difference. First operand 404 states and 581 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:48,147 INFO L93 Difference]: Finished difference Result 925 states and 1348 transitions. [2022-01-10 05:48:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 05:48:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 05:48:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:48,150 INFO L225 Difference]: With dead ends: 925 [2022-01-10 05:48:48,150 INFO L226 Difference]: Without dead ends: 761 [2022-01-10 05:48:48,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-10 05:48:48,152 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 1376 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:48,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 1078 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 05:48:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-10 05:48:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 741. [2022-01-10 05:48:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.4283783783783783) internal successors, (1057), 740 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1057 transitions. [2022-01-10 05:48:48,174 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1057 transitions. Word has length 73 [2022-01-10 05:48:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1057 transitions. [2022-01-10 05:48:48,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1057 transitions. [2022-01-10 05:48:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 05:48:48,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:48,175 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:48,184 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 05:48:48,384 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 05:48:48,385 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash -112559507, now seen corresponding path program 1 times [2022-01-10 05:48:48,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:48,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706010471] [2022-01-10 05:48:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:48,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:48,386 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 05:48:48,388 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 05:48:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 05:48:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:48,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:49,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706010471] [2022-01-10 05:48:49,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706010471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:49,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:49,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 05:48:49,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071562742] [2022-01-10 05:48:49,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:49,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 05:48:49,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 05:48:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:49,872 INFO L87 Difference]: Start difference. First operand 741 states and 1057 transitions. Second operand has 16 states, 16 states have (on average 10.1875) internal successors, (163), 16 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:49,986 INFO L93 Difference]: Finished difference Result 744 states and 1059 transitions. [2022-01-10 05:48:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 05:48:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.1875) internal successors, (163), 16 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 05:48:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:49,989 INFO L225 Difference]: With dead ends: 744 [2022-01-10 05:48:49,989 INFO L226 Difference]: Without dead ends: 742 [2022-01-10 05:48:49,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:49,990 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 196 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:49,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2205 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 205 Unchecked, 0.1s Time] [2022-01-10 05:48:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-10 05:48:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 741. [2022-01-10 05:48:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.4256756756756757) internal successors, (1055), 740 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1055 transitions. [2022-01-10 05:48:50,009 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1055 transitions. Word has length 86 [2022-01-10 05:48:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:50,010 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1055 transitions. [2022-01-10 05:48:50,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.1875) internal successors, (163), 16 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1055 transitions. [2022-01-10 05:48:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 05:48:50,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:50,011 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:50,023 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 05:48:50,220 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 05:48:50,221 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 990487682, now seen corresponding path program 1 times [2022-01-10 05:48:50,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272035644] [2022-01-10 05:48:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:50,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:50,223 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 05:48:50,224 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 05:48:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 05:48:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 30 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:50,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 30 proven. 184 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 05:48:51,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:51,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272035644] [2022-01-10 05:48:51,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272035644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:51,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2022-01-10 05:48:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80273313] [2022-01-10 05:48:51,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:51,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 05:48:51,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 05:48:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:51,421 INFO L87 Difference]: Start difference. First operand 741 states and 1055 transitions. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:51,696 INFO L93 Difference]: Finished difference Result 751 states and 1060 transitions. [2022-01-10 05:48:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 05:48:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-01-10 05:48:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:51,699 INFO L225 Difference]: With dead ends: 751 [2022-01-10 05:48:51,699 INFO L226 Difference]: Without dead ends: 749 [2022-01-10 05:48:51,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-10 05:48:51,700 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 436 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:51,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 2798 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 05:48:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-10 05:48:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 741. [2022-01-10 05:48:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.4202702702702703) internal successors, (1051), 740 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1051 transitions. [2022-01-10 05:48:51,723 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1051 transitions. Word has length 119 [2022-01-10 05:48:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:51,723 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1051 transitions. [2022-01-10 05:48:51,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1051 transitions. [2022-01-10 05:48:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 05:48:51,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:51,724 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:51,739 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 05:48:51,935 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 05:48:51,936 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -601391066, now seen corresponding path program 1 times [2022-01-10 05:48:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283910525] [2022-01-10 05:48:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:51,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:51,938 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 05:48:51,972 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 05:48:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 05:48:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 33 proven. 302 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 05:48:52,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 33 proven. 302 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 05:48:53,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:53,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283910525] [2022-01-10 05:48:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283910525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:53,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 05:48:53,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235519420] [2022-01-10 05:48:53,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:53,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 05:48:53,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 05:48:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-10 05:48:53,126 INFO L87 Difference]: Start difference. First operand 741 states and 1051 transitions. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:53,289 INFO L93 Difference]: Finished difference Result 868 states and 1227 transitions. [2022-01-10 05:48:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 05:48:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-01-10 05:48:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:53,293 INFO L225 Difference]: With dead ends: 868 [2022-01-10 05:48:53,293 INFO L226 Difference]: Without dead ends: 863 [2022-01-10 05:48:53,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:53,294 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 609 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:53,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 2015 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-01-10 05:48:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-10 05:48:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 860. [2022-01-10 05:48:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 1.4155995343422585) internal successors, (1216), 859 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1216 transitions. [2022-01-10 05:48:53,320 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1216 transitions. Word has length 131 [2022-01-10 05:48:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:53,321 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1216 transitions. [2022-01-10 05:48:53,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1216 transitions. [2022-01-10 05:48:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 05:48:53,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:53,325 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:53,338 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 05:48:53,535 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 05:48:53,536 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1800239690, now seen corresponding path program 1 times [2022-01-10 05:48:53,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:53,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577727005] [2022-01-10 05:48:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:53,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:53,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:53,538 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 05:48:53,570 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 05:48:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:53,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 05:48:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 36 proven. 385 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 05:48:54,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 36 proven. 385 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 05:48:54,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577727005] [2022-01-10 05:48:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577727005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:54,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:54,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 05:48:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816227916] [2022-01-10 05:48:54,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:54,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 05:48:54,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 05:48:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:48:54,405 INFO L87 Difference]: Start difference. First operand 860 states and 1216 transitions. Second operand has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:54,774 INFO L93 Difference]: Finished difference Result 875 states and 1225 transitions. [2022-01-10 05:48:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 05:48:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-01-10 05:48:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:54,778 INFO L225 Difference]: With dead ends: 875 [2022-01-10 05:48:54,778 INFO L226 Difference]: Without dead ends: 870 [2022-01-10 05:48:54,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 278 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-10 05:48:54,779 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 614 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:54,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 2974 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 05:48:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-10 05:48:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 741. [2022-01-10 05:48:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.414864864864865) internal successors, (1047), 740 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1047 transitions. [2022-01-10 05:48:54,803 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1047 transitions. Word has length 147 [2022-01-10 05:48:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:54,804 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1047 transitions. [2022-01-10 05:48:54,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1047 transitions. [2022-01-10 05:48:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 05:48:54,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:54,805 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:54,817 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 05:48:55,017 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 05:48:55,017 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 38595792, now seen corresponding path program 1 times [2022-01-10 05:48:55,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:55,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439229452] [2022-01-10 05:48:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:55,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:55,020 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 05:48:55,022 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 05:48:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 05:48:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:55,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:48:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:56,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439229452] [2022-01-10 05:48:56,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439229452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:48:56,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:48:56,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-10 05:48:56,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008925409] [2022-01-10 05:48:56,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:48:56,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 05:48:56,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:56,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 05:48:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-10 05:48:56,762 INFO L87 Difference]: Start difference. First operand 741 states and 1047 transitions. Second operand has 26 states, 26 states have (on average 11.038461538461538) internal successors, (287), 26 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:57,396 INFO L93 Difference]: Finished difference Result 751 states and 1053 transitions. [2022-01-10 05:48:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 05:48:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 11.038461538461538) internal successors, (287), 26 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-01-10 05:48:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:57,399 INFO L225 Difference]: With dead ends: 751 [2022-01-10 05:48:57,399 INFO L226 Difference]: Without dead ends: 749 [2022-01-10 05:48:57,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 05:48:57,400 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 642 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:57,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 4222 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 05:48:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-10 05:48:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 741. [2022-01-10 05:48:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.412162162162162) internal successors, (1045), 740 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1045 transitions. [2022-01-10 05:48:57,422 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1045 transitions. Word has length 148 [2022-01-10 05:48:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:57,422 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1045 transitions. [2022-01-10 05:48:57,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.038461538461538) internal successors, (287), 26 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1045 transitions. [2022-01-10 05:48:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 05:48:57,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:57,424 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:57,435 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 05:48:57,635 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 05:48:57,635 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash -45491697, now seen corresponding path program 2 times [2022-01-10 05:48:57,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690930546] [2022-01-10 05:48:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 05:48:57,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:57,638 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 05:48:57,640 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 05:48:57,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 05:48:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:48:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 05:48:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:48:58,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:49:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:49:00,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:49:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690930546] [2022-01-10 05:49:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690930546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:49:00,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:49:00,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-10 05:49:00,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597904452] [2022-01-10 05:49:00,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:49:00,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 05:49:00,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:49:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 05:49:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-01-10 05:49:00,620 INFO L87 Difference]: Start difference. First operand 741 states and 1045 transitions. Second operand has 32 states, 32 states have (on average 10.84375) internal successors, (347), 32 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:49:01,341 INFO L93 Difference]: Finished difference Result 1025 states and 1436 transitions. [2022-01-10 05:49:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 05:49:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 10.84375) internal successors, (347), 32 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-01-10 05:49:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:49:01,346 INFO L225 Difference]: With dead ends: 1025 [2022-01-10 05:49:01,346 INFO L226 Difference]: Without dead ends: 1023 [2022-01-10 05:49:01,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 05:49:01,347 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 971 mSDsluCounter, 6970 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 7363 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:49:01,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 7363 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 392 Unchecked, 0.1s Time] [2022-01-10 05:49:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-10 05:49:01,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2022-01-10 05:49:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.4001956947162426) internal successors, (1431), 1022 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1431 transitions. [2022-01-10 05:49:01,381 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1431 transitions. Word has length 178 [2022-01-10 05:49:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:49:01,382 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1431 transitions. [2022-01-10 05:49:01,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 10.84375) internal successors, (347), 32 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1431 transitions. [2022-01-10 05:49:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 05:49:01,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:49:01,384 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:49:01,395 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 05:49:01,595 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 05:49:01,596 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:49:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:49:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1121314851, now seen corresponding path program 1 times [2022-01-10 05:49:01,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:49:01,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619283379] [2022-01-10 05:49:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:49:01,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:49:01,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:49:01,598 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 05:49:01,599 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 05:49:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:49:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 05:49:01,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:49:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 125 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 05:49:02,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:49:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 125 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 05:49:02,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:49:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619283379] [2022-01-10 05:49:02,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619283379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:49:02,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:49:02,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 05:49:02,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808089286] [2022-01-10 05:49:02,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:49:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 05:49:02,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:49:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 05:49:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-10 05:49:02,718 INFO L87 Difference]: Start difference. First operand 1023 states and 1431 transitions. Second operand has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:49:03,726 INFO L93 Difference]: Finished difference Result 1962 states and 2762 transitions. [2022-01-10 05:49:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 05:49:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-01-10 05:49:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:49:03,731 INFO L225 Difference]: With dead ends: 1962 [2022-01-10 05:49:03,731 INFO L226 Difference]: Without dead ends: 1559 [2022-01-10 05:49:03,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2022-01-10 05:49:03,733 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 3752 mSDsluCounter, 4269 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 4674 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 05:49:03,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3752 Valid, 4674 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 05:49:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-01-10 05:49:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1473. [2022-01-10 05:49:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 1.4137228260869565) internal successors, (2081), 1472 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2081 transitions. [2022-01-10 05:49:03,782 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2081 transitions. Word has length 193 [2022-01-10 05:49:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:49:03,782 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2081 transitions. [2022-01-10 05:49:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.3) internal successors, (306), 20 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:49:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2081 transitions. [2022-01-10 05:49:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-10 05:49:03,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:49:03,787 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 23, 23, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:49:03,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 05:49:03,999 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 05:49:03,999 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:49:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:49:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash -782945197, now seen corresponding path program 3 times [2022-01-10 05:49:04,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:49:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558433970] [2022-01-10 05:49:04,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 05:49:04,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:49:04,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:49:04,001 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 05:49:04,002 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 05:49:04,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-01-10 05:49:04,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:49:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-10 05:49:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:49:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 113 proven. 2954 refuted. 10 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 05:49:19,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:49:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 284 proven. 2793 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 05:49:26,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:49:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558433970] [2022-01-10 05:49:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558433970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:49:26,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:49:26,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 57 [2022-01-10 05:49:26,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841223824] [2022-01-10 05:49:26,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:49:26,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-10 05:49:26,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:49:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-10 05:49:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=2358, Unknown=7, NotChecked=0, Total=3192 [2022-01-10 05:49:26,645 INFO L87 Difference]: Start difference. First operand 1473 states and 2081 transitions. Second operand has 57 states, 57 states have (on average 11.421052631578947) internal successors, (651), 57 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)