/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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:14:02,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:14:02,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:14:02,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 07:14:02,316 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 07:14:02,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:14:02,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:14:02,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:14:02,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:14:02,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:14:02,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:14:02,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:14:02,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:14:02,341 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:14:02,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:14:02,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:14:02,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:14:02,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:14:02,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:02,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:14:02,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:14:02,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:14:02,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:14:02,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:14:02,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:14:02,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:14:02,547 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:14:02,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:02,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e055024a/48bfb862f72844249383b321ea7fa3eb/FLAGc150cc9a5 [2022-01-10 07:14:02,973 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:14:02,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:02,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e055024a/48bfb862f72844249383b321ea7fa3eb/FLAGc150cc9a5 [2022-01-10 07:14:02,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e055024a/48bfb862f72844249383b321ea7fa3eb [2022-01-10 07:14:02,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:14:02,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:14:03,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:03,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:14:03,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:14:03,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:02" (1/1) ... [2022-01-10 07:14:03,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428fe430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03, skipping insertion in model container [2022-01-10 07:14:03,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:02" (1/1) ... [2022-01-10 07:14:03,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:14:03,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:14:03,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4105,4118] [2022-01-10 07:14:03,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:03,274 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:14:03,308 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4105,4118] [2022-01-10 07:14:03,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:03,325 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:14:03,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03 WrapperNode [2022-01-10 07:14:03,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:03,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:03,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:14:03,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:14:03,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,367 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 257 [2022-01-10 07:14:03,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:03,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:14:03,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:14:03,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:14:03,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:14:03,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:14:03,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:14:03,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:14:03,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (1/1) ... [2022-01-10 07:14:03,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:14:03,439 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 07:14:03,444 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 07:14:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:14:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:14:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:14:03,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:14:03,570 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:14:03,571 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:14:03,790 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:14:03,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:14:03,794 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:14:03,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:03 BoogieIcfgContainer [2022-01-10 07:14:03,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:14:03,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:14:03,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:14:03,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:14:03,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:14:02" (1/3) ... [2022-01-10 07:14:03,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ac857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:03, skipping insertion in model container [2022-01-10 07:14:03,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:03" (2/3) ... [2022-01-10 07:14:03,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ac857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:03, skipping insertion in model container [2022-01-10 07:14:03,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:03" (3/3) ... [2022-01-10 07:14:03,800 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:14:03,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:14:03,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:14:03,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:14:03,845 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 07:14:03,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:14:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 07:14:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 07:14:03,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:03,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:03,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:03,870 INFO L85 PathProgramCache]: Analyzing trace with hash -976687966, now seen corresponding path program 1 times [2022-01-10 07:14:03,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:03,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788870196] [2022-01-10 07:14:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:03,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:03,903 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 07:14:03,905 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 07:14:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:04,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:04,472 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 07:14:04,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:04,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:04,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788870196] [2022-01-10 07:14:04,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788870196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:04,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:04,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:04,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083738168] [2022-01-10 07:14:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:04,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:04,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:04,505 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 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 07:14:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:04,561 INFO L93 Difference]: Finished difference Result 126 states and 190 transitions. [2022-01-10 07:14:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 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 37 [2022-01-10 07:14:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:04,569 INFO L225 Difference]: With dead ends: 126 [2022-01-10 07:14:04,569 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 07:14:04,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:04,573 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 78 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:04,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 166 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-01-10 07:14:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 07:14:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-01-10 07:14:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 63 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 07:14:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2022-01-10 07:14:04,597 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 37 [2022-01-10 07:14:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:04,598 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2022-01-10 07:14:04,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 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 07:14:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2022-01-10 07:14:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 07:14:04,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:04,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:04,622 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 07:14:04,806 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 07:14:04,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -111155577, now seen corresponding path program 1 times [2022-01-10 07:14:04,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303447217] [2022-01-10 07:14:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:04,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:04,809 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 07:14:04,811 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 07:14:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:04,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:04,922 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 07:14:04,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:04,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303447217] [2022-01-10 07:14:04,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303447217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:04,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:04,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:04,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084659877] [2022-01-10 07:14:04,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:04,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:04,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:04,925 INFO L87 Difference]: Start difference. First operand 64 states and 89 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 07:14:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:04,940 INFO L93 Difference]: Finished difference Result 140 states and 208 transitions. [2022-01-10 07:14:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:04,941 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 37 [2022-01-10 07:14:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:04,942 INFO L225 Difference]: With dead ends: 140 [2022-01-10 07:14:04,942 INFO L226 Difference]: Without dead ends: 98 [2022-01-10 07:14:04,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 07:14:04,943 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 51 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:04,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-10 07:14:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-01-10 07:14:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 95 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 07:14:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2022-01-10 07:14:04,951 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 37 [2022-01-10 07:14:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:04,951 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2022-01-10 07:14:04,951 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 07:14:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2022-01-10 07:14:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 07:14:04,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:04,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:04,960 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 07:14:05,159 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 07:14:05,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -511042553, now seen corresponding path program 1 times [2022-01-10 07:14:05,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943923686] [2022-01-10 07:14:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:05,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:05,167 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 07:14:05,168 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 07:14:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:05,441 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 07:14:05,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:05,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943923686] [2022-01-10 07:14:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943923686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:05,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:05,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:05,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023076375] [2022-01-10 07:14:05,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:05,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:05,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:05,443 INFO L87 Difference]: Start difference. First operand 96 states and 140 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:05,478 INFO L93 Difference]: Finished difference Result 177 states and 267 transitions. [2022-01-10 07:14:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 07:14:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:05,479 INFO L225 Difference]: With dead ends: 177 [2022-01-10 07:14:05,479 INFO L226 Difference]: Without dead ends: 103 [2022-01-10 07:14:05,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:05,480 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:05,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 205 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-10 07:14:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-10 07:14:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-01-10 07:14:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.46) internal successors, (146), 100 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 146 transitions. [2022-01-10 07:14:05,487 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 146 transitions. Word has length 38 [2022-01-10 07:14:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 146 transitions. [2022-01-10 07:14:05,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 146 transitions. [2022-01-10 07:14:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 07:14:05,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:05,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:05,496 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 07:14:05,697 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 07:14:05,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 260821100, now seen corresponding path program 1 times [2022-01-10 07:14:05,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119927103] [2022-01-10 07:14:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:05,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:05,699 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 07:14:05,701 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 07:14:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:05,841 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 07:14:05,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:05,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:05,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119927103] [2022-01-10 07:14:05,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119927103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:05,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:05,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:05,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812938475] [2022-01-10 07:14:05,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:05,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:05,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:05,843 INFO L87 Difference]: Start difference. First operand 101 states and 146 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:05,857 INFO L93 Difference]: Finished difference Result 233 states and 354 transitions. [2022-01-10 07:14:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 07:14:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:05,858 INFO L225 Difference]: With dead ends: 233 [2022-01-10 07:14:05,858 INFO L226 Difference]: Without dead ends: 159 [2022-01-10 07:14:05,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 07:14:05,859 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 46 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:05,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 177 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-10 07:14:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-01-10 07:14:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5) internal successors, (234), 156 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 07:14:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 234 transitions. [2022-01-10 07:14:05,868 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 234 transitions. Word has length 38 [2022-01-10 07:14:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 234 transitions. [2022-01-10 07:14:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 234 transitions. [2022-01-10 07:14:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 07:14:05,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:05,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:05,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 07:14:06,076 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 07:14:06,077 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -618673698, now seen corresponding path program 1 times [2022-01-10 07:14:06,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913787973] [2022-01-10 07:14:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:06,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:06,079 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 07:14:06,082 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 07:14:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:06,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:06,335 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 07:14:06,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:06,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913787973] [2022-01-10 07:14:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913787973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:06,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:06,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:14:06,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946560706] [2022-01-10 07:14:06,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:06,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:06,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:06,337 INFO L87 Difference]: Start difference. First operand 157 states and 234 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:06,395 INFO L93 Difference]: Finished difference Result 677 states and 1054 transitions. [2022-01-10 07:14:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 07:14:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:06,399 INFO L225 Difference]: With dead ends: 677 [2022-01-10 07:14:06,399 INFO L226 Difference]: Without dead ends: 547 [2022-01-10 07:14:06,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:06,402 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 247 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:06,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 324 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-10 07:14:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 413. [2022-01-10 07:14:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.529126213592233) internal successors, (630), 412 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 630 transitions. [2022-01-10 07:14:06,447 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 630 transitions. Word has length 39 [2022-01-10 07:14:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:06,448 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 630 transitions. [2022-01-10 07:14:06,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 630 transitions. [2022-01-10 07:14:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 07:14:06,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:06,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:06,473 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 07:14:06,658 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 07:14:06,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1533207258, now seen corresponding path program 1 times [2022-01-10 07:14:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:06,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812236983] [2022-01-10 07:14:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:06,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:06,661 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 07:14:06,662 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 07:14:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:06,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:06,769 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 07:14:06,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:06,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:06,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812236983] [2022-01-10 07:14:06,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812236983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:06,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:06,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:06,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603372778] [2022-01-10 07:14:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:06,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:06,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:06,771 INFO L87 Difference]: Start difference. First operand 413 states and 630 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:06,798 INFO L93 Difference]: Finished difference Result 1121 states and 1720 transitions. [2022-01-10 07:14:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 07:14:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:06,801 INFO L225 Difference]: With dead ends: 1121 [2022-01-10 07:14:06,801 INFO L226 Difference]: Without dead ends: 735 [2022-01-10 07:14:06,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 07:14:06,802 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:06,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 142 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-10 07:14:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 721. [2022-01-10 07:14:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.4916666666666667) internal successors, (1074), 720 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 07:14:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1074 transitions. [2022-01-10 07:14:06,822 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1074 transitions. Word has length 41 [2022-01-10 07:14:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:06,822 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1074 transitions. [2022-01-10 07:14:06,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1074 transitions. [2022-01-10 07:14:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 07:14:06,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:06,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:06,845 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 07:14:07,030 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 07:14:07,030 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 933957624, now seen corresponding path program 1 times [2022-01-10 07:14:07,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851566281] [2022-01-10 07:14:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:07,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:07,035 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 07:14:07,035 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 07:14:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:14:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:07,148 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 07:14:07,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:07,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:07,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851566281] [2022-01-10 07:14:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851566281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:07,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:07,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:07,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389626974] [2022-01-10 07:14:07,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:07,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:14:07,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:14:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:14:07,168 INFO L87 Difference]: Start difference. First operand 721 states and 1074 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:07,228 INFO L93 Difference]: Finished difference Result 1282 states and 1906 transitions. [2022-01-10 07:14:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 07:14:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:07,233 INFO L225 Difference]: With dead ends: 1282 [2022-01-10 07:14:07,233 INFO L226 Difference]: Without dead ends: 1280 [2022-01-10 07:14:07,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:07,234 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 116 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:07,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 291 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-01-10 07:14:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 753. [2022-01-10 07:14:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.4654255319148937) internal successors, (1102), 752 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states 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 07:14:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1102 transitions. [2022-01-10 07:14:07,266 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1102 transitions. Word has length 42 [2022-01-10 07:14:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:07,266 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1102 transitions. [2022-01-10 07:14:07,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1102 transitions. [2022-01-10 07:14:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 07:14:07,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:07,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:07,290 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 07:14:07,482 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 07:14:07,482 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1569583382, now seen corresponding path program 1 times [2022-01-10 07:14:07,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:07,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641775024] [2022-01-10 07:14:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:07,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:07,516 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 07:14:07,518 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 07:14:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:07,615 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 07:14:07,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:07,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:07,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641775024] [2022-01-10 07:14:07,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641775024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:07,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:07,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:07,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52545548] [2022-01-10 07:14:07,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:07,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:07,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:07,617 INFO L87 Difference]: Start difference. First operand 753 states and 1102 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:07,657 INFO L93 Difference]: Finished difference Result 1454 states and 2161 transitions. [2022-01-10 07:14:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 07:14:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:07,660 INFO L225 Difference]: With dead ends: 1454 [2022-01-10 07:14:07,661 INFO L226 Difference]: Without dead ends: 1043 [2022-01-10 07:14:07,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 07:14:07,663 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 53 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:07,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 188 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-10 07:14:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2022-01-10 07:14:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.4625) internal successors, (1521), 1040 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states 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 07:14:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1521 transitions. [2022-01-10 07:14:07,698 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1521 transitions. Word has length 42 [2022-01-10 07:14:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1521 transitions. [2022-01-10 07:14:07,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1521 transitions. [2022-01-10 07:14:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:14:07,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:07,699 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:07,718 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 07:14:07,906 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 07:14:07,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1332276393, now seen corresponding path program 1 times [2022-01-10 07:14:07,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:07,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979730749] [2022-01-10 07:14:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:07,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:07,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:07,909 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 07:14:07,910 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 07:14:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:08,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:08,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979730749] [2022-01-10 07:14:08,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979730749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:08,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:08,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:08,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747145070] [2022-01-10 07:14:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:08,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:08,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:08,049 INFO L87 Difference]: Start difference. First operand 1041 states and 1521 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:08,085 INFO L93 Difference]: Finished difference Result 1765 states and 2596 transitions. [2022-01-10 07:14:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:14:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:08,087 INFO L225 Difference]: With dead ends: 1765 [2022-01-10 07:14:08,087 INFO L226 Difference]: Without dead ends: 751 [2022-01-10 07:14:08,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 07:14:08,088 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 40 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:08,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-10 07:14:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2022-01-10 07:14:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4558823529411764) internal successors, (1089), 748 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 07:14:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1089 transitions. [2022-01-10 07:14:08,108 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1089 transitions. Word has length 61 [2022-01-10 07:14:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:08,108 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1089 transitions. [2022-01-10 07:14:08,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1089 transitions. [2022-01-10 07:14:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:14:08,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:08,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:08,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 07:14:08,315 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 07:14:08,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1884623893, now seen corresponding path program 1 times [2022-01-10 07:14:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673126219] [2022-01-10 07:14:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:08,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:08,318 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 07:14:08,320 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 07:14:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:08,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:09,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673126219] [2022-01-10 07:14:09,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673126219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:09,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:09,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:09,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880969228] [2022-01-10 07:14:09,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:09,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:09,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:09,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:09,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:09,146 INFO L87 Difference]: Start difference. First operand 749 states and 1089 transitions. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 07:14:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:09,218 INFO L93 Difference]: Finished difference Result 1466 states and 2145 transitions. [2022-01-10 07:14:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 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 62 [2022-01-10 07:14:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:09,220 INFO L225 Difference]: With dead ends: 1466 [2022-01-10 07:14:09,221 INFO L226 Difference]: Without dead ends: 768 [2022-01-10 07:14:09,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:09,222 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 44 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:09,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 485 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-01-10 07:14:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-10 07:14:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2022-01-10 07:14:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.4485006518904824) internal successors, (1111), 767 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states 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 07:14:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1111 transitions. [2022-01-10 07:14:09,242 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1111 transitions. Word has length 62 [2022-01-10 07:14:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:09,243 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1111 transitions. [2022-01-10 07:14:09,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 07:14:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1111 transitions. [2022-01-10 07:14:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:14:09,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:09,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:09,267 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 07:14:09,450 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 07:14:09,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2114297975, now seen corresponding path program 1 times [2022-01-10 07:14:09,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43943152] [2022-01-10 07:14:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:09,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:09,452 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 07:14:09,455 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 07:14:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:09,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:10,264 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 07:14:10,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:10,483 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 07:14:10,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43943152] [2022-01-10 07:14:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43943152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:10,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944110869] [2022-01-10 07:14:10,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:10,485 INFO L87 Difference]: Start difference. First operand 768 states and 1111 transitions. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 15 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 07:14:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:10,614 INFO L93 Difference]: Finished difference Result 1510 states and 2198 transitions. [2022-01-10 07:14:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 15 states have internal predecessors, (114), 0 states have call successors, (0), 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 62 [2022-01-10 07:14:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:10,617 INFO L225 Difference]: With dead ends: 1510 [2022-01-10 07:14:10,617 INFO L226 Difference]: Without dead ends: 812 [2022-01-10 07:14:10,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:10,618 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 81 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:10,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 551 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 115 Unchecked, 0.0s Time] [2022-01-10 07:14:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-10 07:14:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 778. [2022-01-10 07:14:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.4478764478764479) internal successors, (1125), 777 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states 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 07:14:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1125 transitions. [2022-01-10 07:14:10,639 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1125 transitions. Word has length 62 [2022-01-10 07:14:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:10,639 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1125 transitions. [2022-01-10 07:14:10,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 15 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 07:14:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1125 transitions. [2022-01-10 07:14:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:14:10,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:10,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:10,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 07:14:10,847 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 07:14:10,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1516352666, now seen corresponding path program 1 times [2022-01-10 07:14:10,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:10,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605354928] [2022-01-10 07:14:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:10,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:10,849 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 07:14:10,850 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 07:14:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:11,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:11,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605354928] [2022-01-10 07:14:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605354928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:11,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:11,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:11,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566494346] [2022-01-10 07:14:11,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:11,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:11,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:11,111 INFO L87 Difference]: Start difference. First operand 778 states and 1125 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:11,153 INFO L93 Difference]: Finished difference Result 1488 states and 2170 transitions. [2022-01-10 07:14:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 07:14:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:11,156 INFO L225 Difference]: With dead ends: 1488 [2022-01-10 07:14:11,156 INFO L226 Difference]: Without dead ends: 778 [2022-01-10 07:14:11,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:11,157 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:11,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-01-10 07:14:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-10 07:14:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-01-10 07:14:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.4465894465894467) internal successors, (1124), 777 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:14:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1124 transitions. [2022-01-10 07:14:11,198 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1124 transitions. Word has length 62 [2022-01-10 07:14:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:11,198 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1124 transitions. [2022-01-10 07:14:11,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1124 transitions. [2022-01-10 07:14:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:14:11,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:11,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:11,216 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 07:14:11,406 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 07:14:11,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1243280141, now seen corresponding path program 1 times [2022-01-10 07:14:11,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:11,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355336570] [2022-01-10 07:14:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:11,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:11,408 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 07:14:11,409 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 07:14:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:12,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:12,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355336570] [2022-01-10 07:14:12,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355336570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:12,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018383154] [2022-01-10 07:14:12,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:12,308 INFO L87 Difference]: Start difference. First operand 778 states and 1124 transitions. Second operand has 16 states, 16 states have (on average 7.5) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:14:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:12,436 INFO L93 Difference]: Finished difference Result 1492 states and 2185 transitions. [2022-01-10 07:14:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 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 07:14:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:12,439 INFO L225 Difference]: With dead ends: 1492 [2022-01-10 07:14:12,439 INFO L226 Difference]: Without dead ends: 794 [2022-01-10 07:14:12,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:12,440 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 607 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-01-10 07:14:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-10 07:14:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 790. [2022-01-10 07:14:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.4474017743979721) internal successors, (1142), 789 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 07:14:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1142 transitions. [2022-01-10 07:14:12,466 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1142 transitions. Word has length 63 [2022-01-10 07:14:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:12,466 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1142 transitions. [2022-01-10 07:14:12,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:14:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1142 transitions. [2022-01-10 07:14:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:14:12,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:12,467 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:12,491 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 07:14:12,673 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 07:14:12,674 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1816052549, now seen corresponding path program 1 times [2022-01-10 07:14:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006143005] [2022-01-10 07:14:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:12,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:12,692 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 07:14:12,705 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 07:14:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:12,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:12,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006143005] [2022-01-10 07:14:12,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006143005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:12,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:12,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:12,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871884360] [2022-01-10 07:14:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:12,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:12,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:12,841 INFO L87 Difference]: Start difference. First operand 790 states and 1142 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 07:14:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:12,862 INFO L93 Difference]: Finished difference Result 1142 states and 1660 transitions. [2022-01-10 07:14:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 07:14:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:12,864 INFO L225 Difference]: With dead ends: 1142 [2022-01-10 07:14:12,864 INFO L226 Difference]: Without dead ends: 444 [2022-01-10 07:14:12,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 07:14:12,865 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:12,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 163 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-10 07:14:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2022-01-10 07:14:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.401360544217687) internal successors, (618), 441 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 618 transitions. [2022-01-10 07:14:12,879 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 618 transitions. Word has length 63 [2022-01-10 07:14:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 618 transitions. [2022-01-10 07:14:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 07:14:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 618 transitions. [2022-01-10 07:14:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:14:12,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:12,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:12,895 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 07:14:13,095 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 07:14:13,096 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1243615600, now seen corresponding path program 1 times [2022-01-10 07:14:13,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239435338] [2022-01-10 07:14:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:13,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:13,100 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 07:14:13,101 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 07:14:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:13,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:13,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239435338] [2022-01-10 07:14:13,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239435338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:13,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:13,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:13,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063171959] [2022-01-10 07:14:13,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:13,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:13,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:13,236 INFO L87 Difference]: Start difference. First operand 442 states and 618 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:13,288 INFO L93 Difference]: Finished difference Result 804 states and 1141 transitions. [2022-01-10 07:14:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 07:14:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:13,301 INFO L225 Difference]: With dead ends: 804 [2022-01-10 07:14:13,301 INFO L226 Difference]: Without dead ends: 442 [2022-01-10 07:14:13,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 07:14:13,304 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:13,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 77 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-10 07:14:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-10 07:14:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.383219954648526) internal successors, (610), 441 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 07:14:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 610 transitions. [2022-01-10 07:14:13,321 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 610 transitions. Word has length 63 [2022-01-10 07:14:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:13,321 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 610 transitions. [2022-01-10 07:14:13,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 610 transitions. [2022-01-10 07:14:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:14:13,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:13,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:13,328 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 07:14:13,528 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 07:14:13,529 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2117589435, now seen corresponding path program 1 times [2022-01-10 07:14:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:13,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988853035] [2022-01-10 07:14:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:13,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:13,531 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 07:14:13,532 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 07:14:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:13,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:13,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:13,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988853035] [2022-01-10 07:14:13,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988853035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:13,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:13,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:13,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833527702] [2022-01-10 07:14:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:13,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:13,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:13,663 INFO L87 Difference]: Start difference. First operand 442 states and 610 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:13,706 INFO L93 Difference]: Finished difference Result 810 states and 1134 transitions. [2022-01-10 07:14:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 07:14:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:13,708 INFO L225 Difference]: With dead ends: 810 [2022-01-10 07:14:13,708 INFO L226 Difference]: Without dead ends: 442 [2022-01-10 07:14:13,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 07:14:13,709 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 54 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:13,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 92 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-10 07:14:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-10 07:14:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.3650793650793651) internal successors, (602), 441 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 07:14:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 602 transitions. [2022-01-10 07:14:13,722 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 602 transitions. Word has length 63 [2022-01-10 07:14:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 602 transitions. [2022-01-10 07:14:13,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 602 transitions. [2022-01-10 07:14:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:14:13,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:13,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:13,732 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 07:14:13,935 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 07:14:13,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1734858105, now seen corresponding path program 1 times [2022-01-10 07:14:13,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481841074] [2022-01-10 07:14:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:13,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:13,938 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 07:14:13,951 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 07:14:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:14,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:14,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:14,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481841074] [2022-01-10 07:14:14,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481841074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:14,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:14,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:14,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083795619] [2022-01-10 07:14:14,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:14,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:14,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:14,078 INFO L87 Difference]: Start difference. First operand 442 states and 602 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:14,130 INFO L93 Difference]: Finished difference Result 792 states and 1101 transitions. [2022-01-10 07:14:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 07:14:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:14,132 INFO L225 Difference]: With dead ends: 792 [2022-01-10 07:14:14,132 INFO L226 Difference]: Without dead ends: 418 [2022-01-10 07:14:14,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 07:14:14,133 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 52 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:14,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 98 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-10 07:14:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-01-10 07:14:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.3645083932853717) internal successors, (569), 417 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 569 transitions. [2022-01-10 07:14:14,148 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 569 transitions. Word has length 63 [2022-01-10 07:14:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:14,148 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 569 transitions. [2022-01-10 07:14:14,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 569 transitions. [2022-01-10 07:14:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:14,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:14,148 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:14,163 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 07:14:14,355 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 07:14:14,355 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -227214499, now seen corresponding path program 1 times [2022-01-10 07:14:14,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:14,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387259925] [2022-01-10 07:14:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:14,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:14,357 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 07:14:14,359 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 07:14:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:14,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:14,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:14,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387259925] [2022-01-10 07:14:14,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387259925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:14,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:14,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:14,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350744150] [2022-01-10 07:14:14,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:14,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:14,489 INFO L87 Difference]: Start difference. First operand 418 states and 569 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 07:14:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:14,508 INFO L93 Difference]: Finished difference Result 596 states and 817 transitions. [2022-01-10 07:14:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:14,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-01-10 07:14:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:14,509 INFO L225 Difference]: With dead ends: 596 [2022-01-10 07:14:14,509 INFO L226 Difference]: Without dead ends: 246 [2022-01-10 07:14:14,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 07:14:14,510 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:14,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 142 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:14,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-10 07:14:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-01-10 07:14:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.308641975308642) internal successors, (318), 243 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 07:14:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 318 transitions. [2022-01-10 07:14:14,519 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 318 transitions. Word has length 64 [2022-01-10 07:14:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:14,519 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 318 transitions. [2022-01-10 07:14:14,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 07:14:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 318 transitions. [2022-01-10 07:14:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:14,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:14,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:14,539 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 07:14:14,726 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 07:14:14,727 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash -665941667, now seen corresponding path program 1 times [2022-01-10 07:14:14,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:14,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410583312] [2022-01-10 07:14:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:14,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:14,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:14,728 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 07:14:14,732 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 07:14:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:14,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:15,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:15,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410583312] [2022-01-10 07:14:15,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410583312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:15,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:15,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:14:15,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515735393] [2022-01-10 07:14:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:15,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:15,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:15,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:15,007 INFO L87 Difference]: Start difference. First operand 244 states and 318 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:15,063 INFO L93 Difference]: Finished difference Result 488 states and 652 transitions. [2022-01-10 07:14:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:14:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:15,064 INFO L225 Difference]: With dead ends: 488 [2022-01-10 07:14:15,064 INFO L226 Difference]: Without dead ends: 428 [2022-01-10 07:14:15,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:15,065 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 178 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:15,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 360 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-10 07:14:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 364. [2022-01-10 07:14:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.3112947658402203) internal successors, (476), 363 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 07:14:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 476 transitions. [2022-01-10 07:14:15,077 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 476 transitions. Word has length 64 [2022-01-10 07:14:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 476 transitions. [2022-01-10 07:14:15,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 476 transitions. [2022-01-10 07:14:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:15,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:15,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:15,101 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 07:14:15,285 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 07:14:15,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1944795840, now seen corresponding path program 1 times [2022-01-10 07:14:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325281794] [2022-01-10 07:14:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:15,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:15,287 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 07:14:15,288 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 07:14:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:15,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:15,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:15,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325281794] [2022-01-10 07:14:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325281794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:15,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:15,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:14:15,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102374466] [2022-01-10 07:14:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:15,550 INFO L87 Difference]: Start difference. First operand 364 states and 476 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:15,616 INFO L93 Difference]: Finished difference Result 546 states and 729 transitions. [2022-01-10 07:14:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:14:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:15,617 INFO L225 Difference]: With dead ends: 546 [2022-01-10 07:14:15,617 INFO L226 Difference]: Without dead ends: 370 [2022-01-10 07:14:15,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:15,618 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 191 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:15,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 378 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-10 07:14:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 306. [2022-01-10 07:14:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.2885245901639344) internal successors, (393), 305 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 07:14:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 393 transitions. [2022-01-10 07:14:15,642 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 393 transitions. Word has length 64 [2022-01-10 07:14:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:15,643 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 393 transitions. [2022-01-10 07:14:15,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 393 transitions. [2022-01-10 07:14:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:15,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:15,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:15,652 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 07:14:15,850 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 07:14:15,850 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1978085152, now seen corresponding path program 1 times [2022-01-10 07:14:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650194081] [2022-01-10 07:14:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:15,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:15,852 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 07:14:15,853 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 07:14:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:16,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:16,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:16,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650194081] [2022-01-10 07:14:16,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650194081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:16,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:16,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:14:16,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688029513] [2022-01-10 07:14:16,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:16,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:16,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:16,159 INFO L87 Difference]: Start difference. First operand 306 states and 393 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 07:14:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:16,222 INFO L93 Difference]: Finished difference Result 492 states and 650 transitions. [2022-01-10 07:14:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 64 [2022-01-10 07:14:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:16,223 INFO L225 Difference]: With dead ends: 492 [2022-01-10 07:14:16,223 INFO L226 Difference]: Without dead ends: 432 [2022-01-10 07:14:16,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:16,225 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 175 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:16,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 395 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-10 07:14:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 368. [2022-01-10 07:14:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.2915531335149864) internal successors, (474), 367 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 474 transitions. [2022-01-10 07:14:16,242 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 474 transitions. Word has length 64 [2022-01-10 07:14:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:16,243 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 474 transitions. [2022-01-10 07:14:16,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 07:14:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 474 transitions. [2022-01-10 07:14:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:14:16,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:16,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:16,268 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 07:14:16,452 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 07:14:16,452 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2097941597, now seen corresponding path program 1 times [2022-01-10 07:14:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198769062] [2022-01-10 07:14:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:16,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:16,454 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 07:14:16,455 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 07:14:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 07:14:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:18,157 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 07:14:18,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:19,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198769062] [2022-01-10 07:14:19,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198769062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:19,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:19,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 07:14:19,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294342543] [2022-01-10 07:14:19,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 07:14:19,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 07:14:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 07:14:19,135 INFO L87 Difference]: Start difference. First operand 368 states and 474 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:19,572 INFO L93 Difference]: Finished difference Result 624 states and 802 transitions. [2022-01-10 07:14:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 07:14:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 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 65 [2022-01-10 07:14:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:19,574 INFO L225 Difference]: With dead ends: 624 [2022-01-10 07:14:19,574 INFO L226 Difference]: Without dead ends: 502 [2022-01-10 07:14:19,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 07:14:19,575 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 154 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:19,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 968 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 296 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-01-10 07:14:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-10 07:14:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 374. [2022-01-10 07:14:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.289544235924933) internal successors, (481), 373 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 07:14:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 481 transitions. [2022-01-10 07:14:19,590 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 481 transitions. Word has length 65 [2022-01-10 07:14:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 481 transitions. [2022-01-10 07:14:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 481 transitions. [2022-01-10 07:14:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:14:19,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:19,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:19,597 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 07:14:19,797 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 07:14:19,797 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1355053399, now seen corresponding path program 1 times [2022-01-10 07:14:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627034850] [2022-01-10 07:14:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:19,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:19,799 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 07:14:19,800 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 07:14:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 07:14:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:21,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:21,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:21,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627034850] [2022-01-10 07:14:21,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627034850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:21,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:21,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 07:14:21,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576026439] [2022-01-10 07:14:21,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:21,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 07:14:21,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 07:14:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 07:14:21,928 INFO L87 Difference]: Start difference. First operand 374 states and 481 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 35 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:22,273 INFO L93 Difference]: Finished difference Result 517 states and 667 transitions. [2022-01-10 07:14:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 07:14:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 35 states have internal predecessors, (121), 0 states have call successors, (0), 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 65 [2022-01-10 07:14:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:22,275 INFO L225 Difference]: With dead ends: 517 [2022-01-10 07:14:22,275 INFO L226 Difference]: Without dead ends: 385 [2022-01-10 07:14:22,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 07:14:22,276 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 154 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:22,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 763 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 273 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-10 07:14:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-10 07:14:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 360. [2022-01-10 07:14:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.2924791086350975) internal successors, (464), 359 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 07:14:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 464 transitions. [2022-01-10 07:14:22,291 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 464 transitions. Word has length 65 [2022-01-10 07:14:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:22,291 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 464 transitions. [2022-01-10 07:14:22,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 35 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 464 transitions. [2022-01-10 07:14:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 07:14:22,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:22,291 INFO L514 BasicCegarLoop]: trace histogram [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, 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 07:14:22,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:22,498 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 07:14:22,498 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1538848933, now seen corresponding path program 1 times [2022-01-10 07:14:22,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:22,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49834548] [2022-01-10 07:14:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:22,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:22,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:22,500 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 07:14:22,501 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 07:14:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 07:14:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:24,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:26,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:26,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49834548] [2022-01-10 07:14:26,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49834548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:26,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:26,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 07:14:26,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298123137] [2022-01-10 07:14:26,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:26,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 07:14:26,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 07:14:26,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 07:14:26,250 INFO L87 Difference]: Start difference. First operand 360 states and 464 transitions. Second operand has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:26,400 INFO L93 Difference]: Finished difference Result 496 states and 645 transitions. [2022-01-10 07:14:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 07:14:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 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 66 [2022-01-10 07:14:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:26,401 INFO L225 Difference]: With dead ends: 496 [2022-01-10 07:14:26,401 INFO L226 Difference]: Without dead ends: 378 [2022-01-10 07:14:26,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 07:14:26,403 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 74 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:26,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 878 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2022-01-10 07:14:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-10 07:14:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 366. [2022-01-10 07:14:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.2904109589041095) internal successors, (471), 365 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 07:14:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 471 transitions. [2022-01-10 07:14:26,419 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 471 transitions. Word has length 66 [2022-01-10 07:14:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:26,419 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 471 transitions. [2022-01-10 07:14:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:14:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 471 transitions. [2022-01-10 07:14:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 07:14:26,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:26,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:26,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 07:14:26,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,636 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1535675016, now seen corresponding path program 1 times [2022-01-10 07:14:26,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:26,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928668800] [2022-01-10 07:14:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:26,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:26,638 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:26,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:14:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:26,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:26,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928668800] [2022-01-10 07:14:26,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928668800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:26,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:26,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:26,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078778881] [2022-01-10 07:14:26,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:26,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:26,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:26,956 INFO L87 Difference]: Start difference. First operand 366 states and 471 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 07:14:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:27,019 INFO L93 Difference]: Finished difference Result 1163 states and 1521 transitions. [2022-01-10 07:14:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:14:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 66 [2022-01-10 07:14:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:27,022 INFO L225 Difference]: With dead ends: 1163 [2022-01-10 07:14:27,022 INFO L226 Difference]: Without dead ends: 871 [2022-01-10 07:14:27,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:14:27,023 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 160 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:27,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 401 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-01-10 07:14:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-10 07:14:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-01-10 07:14:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 1.2885085574572128) internal successors, (1054), 818 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 07:14:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1054 transitions. [2022-01-10 07:14:27,062 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1054 transitions. Word has length 66 [2022-01-10 07:14:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:27,062 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1054 transitions. [2022-01-10 07:14:27,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 07:14:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1054 transitions. [2022-01-10 07:14:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 07:14:27,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:27,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:27,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:27,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:27,270 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1364664539, now seen corresponding path program 1 times [2022-01-10 07:14:27,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:27,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345946964] [2022-01-10 07:14:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:27,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:27,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:27,272 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:14:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 07:14:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:29,134 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 07:14:29,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:30,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345946964] [2022-01-10 07:14:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345946964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:30,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 07:14:30,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684380914] [2022-01-10 07:14:30,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:30,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 07:14:30,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 07:14:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 07:14:30,312 INFO L87 Difference]: Start difference. First operand 819 states and 1054 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 07:14:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:30,951 INFO L93 Difference]: Finished difference Result 1270 states and 1614 transitions. [2022-01-10 07:14:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 07:14:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 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 66 [2022-01-10 07:14:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:30,953 INFO L225 Difference]: With dead ends: 1270 [2022-01-10 07:14:30,953 INFO L226 Difference]: Without dead ends: 926 [2022-01-10 07:14:30,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 07:14:30,955 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 177 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:30,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1234 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 355 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-01-10 07:14:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-10 07:14:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 670. [2022-01-10 07:14:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.28101644245142) internal successors, (857), 669 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 07:14:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 857 transitions. [2022-01-10 07:14:30,988 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 857 transitions. Word has length 66 [2022-01-10 07:14:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 857 transitions. [2022-01-10 07:14:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 07:14:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 857 transitions. [2022-01-10 07:14:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 07:14:30,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:30,989 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 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 07:14:31,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,196 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -398471238, now seen corresponding path program 1 times [2022-01-10 07:14:31,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:31,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551282246] [2022-01-10 07:14:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:31,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:31,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:31,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:14:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:32,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:32,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551282246] [2022-01-10 07:14:32,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551282246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:32,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:32,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 07:14:32,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620913124] [2022-01-10 07:14:32,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:32,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 07:14:32,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 07:14:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:14:32,186 INFO L87 Difference]: Start difference. First operand 670 states and 857 transitions. Second operand has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:14:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:32,255 INFO L93 Difference]: Finished difference Result 854 states and 1100 transitions. [2022-01-10 07:14:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 0 states have call successors, (0), 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 67 [2022-01-10 07:14:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:32,257 INFO L225 Difference]: With dead ends: 854 [2022-01-10 07:14:32,257 INFO L226 Difference]: Without dead ends: 611 [2022-01-10 07:14:32,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:32,258 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 30 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 805 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 61 Unchecked, 0.0s Time] [2022-01-10 07:14:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-10 07:14:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 600. [2022-01-10 07:14:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.2754590984974958) internal successors, (764), 599 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 07:14:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 764 transitions. [2022-01-10 07:14:32,285 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 764 transitions. Word has length 67 [2022-01-10 07:14:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:32,286 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 764 transitions. [2022-01-10 07:14:32,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:14:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 764 transitions. [2022-01-10 07:14:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 07:14:32,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:32,286 INFO L514 BasicCegarLoop]: trace histogram [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, 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 07:14:32,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:32,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:32,493 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2028952558, now seen corresponding path program 1 times [2022-01-10 07:14:32,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283129982] [2022-01-10 07:14:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:32,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:32,495 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:32,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 07:14:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:32,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:32,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283129982] [2022-01-10 07:14:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283129982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:32,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:32,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:32,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768807877] [2022-01-10 07:14:32,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:32,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:32,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:32,776 INFO L87 Difference]: Start difference. First operand 600 states and 764 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 07:14:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:32,838 INFO L93 Difference]: Finished difference Result 1231 states and 1588 transitions. [2022-01-10 07:14:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 67 [2022-01-10 07:14:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:32,840 INFO L225 Difference]: With dead ends: 1231 [2022-01-10 07:14:32,840 INFO L226 Difference]: Without dead ends: 723 [2022-01-10 07:14:32,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:14:32,841 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 108 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:32,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 320 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 07:14:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-10 07:14:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 688. [2022-01-10 07:14:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.272197962154294) internal successors, (874), 687 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 07:14:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 874 transitions. [2022-01-10 07:14:32,874 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 874 transitions. Word has length 67 [2022-01-10 07:14:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 874 transitions. [2022-01-10 07:14:32,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 07:14:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 874 transitions. [2022-01-10 07:14:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 07:14:32,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:32,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 07:14:32,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,084 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1968443629, now seen corresponding path program 1 times [2022-01-10 07:14:33,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751165508] [2022-01-10 07:14:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:33,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:33,085 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:33,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 07:14:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 07:14:33,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 07:14:33,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:33,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751165508] [2022-01-10 07:14:33,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751165508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:33,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:33,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:33,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211677397] [2022-01-10 07:14:33,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:33,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:33,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:33,426 INFO L87 Difference]: Start difference. First operand 688 states and 874 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 07:14:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:33,469 INFO L93 Difference]: Finished difference Result 1154 states and 1470 transitions. [2022-01-10 07:14:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:14:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 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 87 [2022-01-10 07:14:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:33,471 INFO L225 Difference]: With dead ends: 1154 [2022-01-10 07:14:33,471 INFO L226 Difference]: Without dead ends: 599 [2022-01-10 07:14:33,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:14:33,472 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 95 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:33,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 280 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-10 07:14:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-10 07:14:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 592. [2022-01-10 07:14:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 1.248730964467005) internal successors, (738), 591 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 07:14:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 738 transitions. [2022-01-10 07:14:33,499 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 738 transitions. Word has length 87 [2022-01-10 07:14:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:33,499 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 738 transitions. [2022-01-10 07:14:33,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 07:14:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 738 transitions. [2022-01-10 07:14:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:33,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:33,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 07:14:33,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:33,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,706 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1970721521, now seen corresponding path program 1 times [2022-01-10 07:14:33,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:33,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742418011] [2022-01-10 07:14:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:33,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:33,708 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 07:14:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:34,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:34,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742418011] [2022-01-10 07:14:34,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742418011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:34,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:34,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:34,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628187478] [2022-01-10 07:14:34,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:34,904 INFO L87 Difference]: Start difference. First operand 592 states and 738 transitions. Second operand has 18 states, 18 states have (on average 9.555555555555555) internal successors, (172), 17 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 07:14:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:34,989 INFO L93 Difference]: Finished difference Result 1135 states and 1426 transitions. [2022-01-10 07:14:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.555555555555555) internal successors, (172), 17 states have internal predecessors, (172), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:34,991 INFO L225 Difference]: With dead ends: 1135 [2022-01-10 07:14:34,991 INFO L226 Difference]: Without dead ends: 615 [2022-01-10 07:14:34,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-10 07:14:34,992 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 59 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:34,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 697 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2022-01-10 07:14:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-10 07:14:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2022-01-10 07:14:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.242671009771987) internal successors, (763), 614 states have internal predecessors, (763), 0 states have call successors, (0), 0 states 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 07:14:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 763 transitions. [2022-01-10 07:14:35,022 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 763 transitions. Word has length 110 [2022-01-10 07:14:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:35,022 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 763 transitions. [2022-01-10 07:14:35,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.555555555555555) internal successors, (172), 17 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 07:14:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 763 transitions. [2022-01-10 07:14:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:35,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:35,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 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 07:14:35,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:35,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:35,229 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2074465270, now seen corresponding path program 1 times [2022-01-10 07:14:35,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:35,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177463747] [2022-01-10 07:14:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:35,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:35,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:35,231 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:35,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 07:14:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 59 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:36,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 59 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:36,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177463747] [2022-01-10 07:14:36,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177463747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:36,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:36,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:36,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698013698] [2022-01-10 07:14:36,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:36,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:36,476 INFO L87 Difference]: Start difference. First operand 615 states and 763 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 07:14:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:36,598 INFO L93 Difference]: Finished difference Result 1168 states and 1461 transitions. [2022-01-10 07:14:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:36,600 INFO L225 Difference]: With dead ends: 1168 [2022-01-10 07:14:36,600 INFO L226 Difference]: Without dead ends: 654 [2022-01-10 07:14:36,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:14:36,601 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 63 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:36,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 716 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 90 Unchecked, 0.0s Time] [2022-01-10 07:14:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-10 07:14:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2022-01-10 07:14:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.2327718223583461) internal successors, (805), 653 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 07:14:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 805 transitions. [2022-01-10 07:14:36,633 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 805 transitions. Word has length 110 [2022-01-10 07:14:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:36,633 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 805 transitions. [2022-01-10 07:14:36,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 07:14:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 805 transitions. [2022-01-10 07:14:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:36,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:36,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 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, 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 07:14:36,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:36,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:36,841 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash -539067345, now seen corresponding path program 1 times [2022-01-10 07:14:36,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:36,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824755640] [2022-01-10 07:14:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:36,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:36,843 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:36,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 07:14:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:38,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:38,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824755640] [2022-01-10 07:14:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824755640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:38,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:38,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:38,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548210185] [2022-01-10 07:14:38,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:38,529 INFO L87 Difference]: Start difference. First operand 654 states and 805 transitions. Second operand has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 07:14:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:38,713 INFO L93 Difference]: Finished difference Result 1197 states and 1481 transitions. [2022-01-10 07:14:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:14:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:38,715 INFO L225 Difference]: With dead ends: 1197 [2022-01-10 07:14:38,715 INFO L226 Difference]: Without dead ends: 727 [2022-01-10 07:14:38,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-10 07:14:38,716 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 97 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:38,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1098 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 98 Unchecked, 0.0s Time] [2022-01-10 07:14:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-10 07:14:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 727. [2022-01-10 07:14:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.2148760330578512) internal successors, (882), 726 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 882 transitions. [2022-01-10 07:14:38,751 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 882 transitions. Word has length 110 [2022-01-10 07:14:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:38,751 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 882 transitions. [2022-01-10 07:14:38,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 07:14:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 882 transitions. [2022-01-10 07:14:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:38,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:38,752 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 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 07:14:38,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:38,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,959 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:38,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1594765032, now seen corresponding path program 1 times [2022-01-10 07:14:38,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:38,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505645016] [2022-01-10 07:14:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:38,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:38,961 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:38,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 07:14:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:39,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:40,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505645016] [2022-01-10 07:14:40,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505645016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:40,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:40,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:40,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307518414] [2022-01-10 07:14:40,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:40,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:40,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:40,314 INFO L87 Difference]: Start difference. First operand 727 states and 882 transitions. Second operand has 26 states, 26 states have (on average 8.0) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 07:14:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:40,533 INFO L93 Difference]: Finished difference Result 1259 states and 1548 transitions. [2022-01-10 07:14:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.0) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:40,535 INFO L225 Difference]: With dead ends: 1259 [2022-01-10 07:14:40,535 INFO L226 Difference]: Without dead ends: 795 [2022-01-10 07:14:40,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:40,536 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 121 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:40,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1356 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 149 Unchecked, 0.0s Time] [2022-01-10 07:14:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-10 07:14:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-01-10 07:14:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.2052896725440807) internal successors, (957), 794 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 07:14:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 957 transitions. [2022-01-10 07:14:40,577 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 957 transitions. Word has length 110 [2022-01-10 07:14:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:40,577 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 957 transitions. [2022-01-10 07:14:40,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.0) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 07:14:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 957 transitions. [2022-01-10 07:14:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:40,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:40,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 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 07:14:40,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 07:14:40,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:40,785 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash -440818926, now seen corresponding path program 1 times [2022-01-10 07:14:40,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:40,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251343454] [2022-01-10 07:14:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:40,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:40,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:40,787 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:40,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 07:14:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:40,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 13 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:41,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 13 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:42,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:42,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251343454] [2022-01-10 07:14:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251343454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:42,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:42,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:42,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087424449] [2022-01-10 07:14:42,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:42,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:42,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:42,119 INFO L87 Difference]: Start difference. First operand 795 states and 957 transitions. Second operand has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 07:14:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:42,308 INFO L93 Difference]: Finished difference Result 1363 states and 1664 transitions. [2022-01-10 07:14:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:42,311 INFO L225 Difference]: With dead ends: 1363 [2022-01-10 07:14:42,311 INFO L226 Difference]: Without dead ends: 911 [2022-01-10 07:14:42,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:42,311 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 141 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:42,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1421 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 126 Unchecked, 0.0s Time] [2022-01-10 07:14:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-10 07:14:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 911. [2022-01-10 07:14:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 1.1967032967032967) internal successors, (1089), 910 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 07:14:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1089 transitions. [2022-01-10 07:14:42,358 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1089 transitions. Word has length 110 [2022-01-10 07:14:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:42,358 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1089 transitions. [2022-01-10 07:14:42,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 07:14:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1089 transitions. [2022-01-10 07:14:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 07:14:42,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:42,359 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 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 07:14:42,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:42,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,566 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2034569076, now seen corresponding path program 1 times [2022-01-10 07:14:42,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:42,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620581909] [2022-01-10 07:14:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:42,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:42,568 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 07:14:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:43,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:43,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620581909] [2022-01-10 07:14:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620581909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:43,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:43,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:43,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343435190] [2022-01-10 07:14:43,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:43,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:43,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:43,904 INFO L87 Difference]: Start difference. First operand 911 states and 1089 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 07:14:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,000 INFO L93 Difference]: Finished difference Result 1419 states and 1737 transitions. [2022-01-10 07:14:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 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 110 [2022-01-10 07:14:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,003 INFO L225 Difference]: With dead ends: 1419 [2022-01-10 07:14:44,003 INFO L226 Difference]: Without dead ends: 911 [2022-01-10 07:14:44,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:44,004 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 85 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 664 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 07:14:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-10 07:14:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 911. [2022-01-10 07:14:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 1.1923076923076923) internal successors, (1085), 910 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 07:14:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1085 transitions. [2022-01-10 07:14:44,052 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1085 transitions. Word has length 110 [2022-01-10 07:14:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1085 transitions. [2022-01-10 07:14:44,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 07:14:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1085 transitions. [2022-01-10 07:14:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:44,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,053 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 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 07:14:44,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:44,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,263 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1376837143, now seen corresponding path program 1 times [2022-01-10 07:14:44,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:44,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428607973] [2022-01-10 07:14:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:44,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:44,264 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:44,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 07:14:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:44,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:44,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:44,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428607973] [2022-01-10 07:14:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428607973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:44,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:44,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:44,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047483776] [2022-01-10 07:14:44,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:44,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:44,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:44,732 INFO L87 Difference]: Start difference. First operand 911 states and 1085 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 07:14:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,825 INFO L93 Difference]: Finished difference Result 1930 states and 2387 transitions. [2022-01-10 07:14:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 111 [2022-01-10 07:14:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,828 INFO L225 Difference]: With dead ends: 1930 [2022-01-10 07:14:44,829 INFO L226 Difference]: Without dead ends: 1416 [2022-01-10 07:14:44,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:44,829 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 70 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 172 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-10 07:14:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-01-10 07:14:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1400. [2022-01-10 07:14:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.2172980700500358) internal successors, (1703), 1399 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states 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 07:14:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1703 transitions. [2022-01-10 07:14:44,900 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1703 transitions. Word has length 111 [2022-01-10 07:14:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,900 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1703 transitions. [2022-01-10 07:14:44,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 07:14:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1703 transitions. [2022-01-10 07:14:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:44,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:44,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:45,109 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 256809201, now seen corresponding path program 1 times [2022-01-10 07:14:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880558774] [2022-01-10 07:14:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:45,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:45,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:45,110 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:45,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 07:14:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 07:14:46,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 07:14:46,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:46,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880558774] [2022-01-10 07:14:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880558774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:46,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:46,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:46,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002692001] [2022-01-10 07:14:46,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:46,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:46,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:46,393 INFO L87 Difference]: Start difference. First operand 1400 states and 1703 transitions. Second operand has 16 states, 16 states have (on average 11.25) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 07:14:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:46,675 INFO L93 Difference]: Finished difference Result 2478 states and 3075 transitions. [2022-01-10 07:14:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 07:14:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.25) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 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 111 [2022-01-10 07:14:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:46,681 INFO L225 Difference]: With dead ends: 2478 [2022-01-10 07:14:46,681 INFO L226 Difference]: Without dead ends: 1964 [2022-01-10 07:14:46,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-10 07:14:46,686 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 186 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:46,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 966 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 89 Unchecked, 0.0s Time] [2022-01-10 07:14:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-10 07:14:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1431. [2022-01-10 07:14:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.2062937062937062) internal successors, (1725), 1430 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states 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 07:14:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 1725 transitions. [2022-01-10 07:14:46,767 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 1725 transitions. Word has length 111 [2022-01-10 07:14:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 1725 transitions. [2022-01-10 07:14:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.25) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 07:14:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 1725 transitions. [2022-01-10 07:14:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:46,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:46,769 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:46,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 07:14:46,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:46,975 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -480045706, now seen corresponding path program 1 times [2022-01-10 07:14:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:46,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775451098] [2022-01-10 07:14:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:46,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:46,978 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:46,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 07:14:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:47,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:47,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775451098] [2022-01-10 07:14:47,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775451098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:47,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:47,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:47,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445339726] [2022-01-10 07:14:47,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:47,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:47,921 INFO L87 Difference]: Start difference. First operand 1431 states and 1725 transitions. Second operand has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 07:14:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:48,217 INFO L93 Difference]: Finished difference Result 4447 states and 5508 transitions. [2022-01-10 07:14:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 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 111 [2022-01-10 07:14:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:48,238 INFO L225 Difference]: With dead ends: 4447 [2022-01-10 07:14:48,239 INFO L226 Difference]: Without dead ends: 3497 [2022-01-10 07:14:48,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:48,246 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 137 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:48,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 892 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2022-01-10 07:14:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2022-01-10 07:14:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3453. [2022-01-10 07:14:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 1.231749710312862) internal successors, (4252), 3452 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states 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 07:14:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4252 transitions. [2022-01-10 07:14:48,468 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4252 transitions. Word has length 111 [2022-01-10 07:14:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:48,469 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 4252 transitions. [2022-01-10 07:14:48,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 07:14:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4252 transitions. [2022-01-10 07:14:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:48,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:48,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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, 1, 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 07:14:48,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:48,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:48,677 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -954509620, now seen corresponding path program 1 times [2022-01-10 07:14:48,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112929994] [2022-01-10 07:14:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:48,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:48,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:48,679 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:48,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 07:14:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:14:49,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:49,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:49,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112929994] [2022-01-10 07:14:49,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112929994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:49,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:49,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:49,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153575682] [2022-01-10 07:14:49,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:49,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:49,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:49,143 INFO L87 Difference]: Start difference. First operand 3453 states and 4252 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:49,409 INFO L93 Difference]: Finished difference Result 4873 states and 6035 transitions. [2022-01-10 07:14:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 07:14:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:49,414 INFO L225 Difference]: With dead ends: 4873 [2022-01-10 07:14:49,414 INFO L226 Difference]: Without dead ends: 4365 [2022-01-10 07:14:49,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:49,415 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 77 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:49,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 177 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-01-10 07:14:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2022-01-10 07:14:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 4327. [2022-01-10 07:14:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4326 states have (on average 1.221451687471105) internal successors, (5284), 4326 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states 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 07:14:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5284 transitions. [2022-01-10 07:14:49,681 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5284 transitions. Word has length 111 [2022-01-10 07:14:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:49,682 INFO L470 AbstractCegarLoop]: Abstraction has 4327 states and 5284 transitions. [2022-01-10 07:14:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5284 transitions. [2022-01-10 07:14:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:49,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:49,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:49,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:49,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:49,890 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:49,891 INFO L85 PathProgramCache]: Analyzing trace with hash -590516994, now seen corresponding path program 1 times [2022-01-10 07:14:49,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:49,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779692674] [2022-01-10 07:14:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:49,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:49,892 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 07:14:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 07:14:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 22 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:53,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:54,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:54,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779692674] [2022-01-10 07:14:54,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779692674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:54,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:54,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 43 [2022-01-10 07:14:54,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031000994] [2022-01-10 07:14:54,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:54,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 07:14:54,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 07:14:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 07:14:54,502 INFO L87 Difference]: Start difference. First operand 4327 states and 5284 transitions. Second operand has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 07:14:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:55,610 INFO L93 Difference]: Finished difference Result 5941 states and 7228 transitions. [2022-01-10 07:14:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-10 07:14:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 0 states have call successors, (0), 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 111 [2022-01-10 07:14:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:55,617 INFO L225 Difference]: With dead ends: 5941 [2022-01-10 07:14:55,617 INFO L226 Difference]: Without dead ends: 5651 [2022-01-10 07:14:55,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 07:14:55,619 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 374 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:55,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2203 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 553 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2022-01-10 07:14:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2022-01-10 07:14:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4343. [2022-01-10 07:14:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4342 states have (on average 1.221556886227545) internal successors, (5304), 4342 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states 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 07:14:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 5304 transitions. [2022-01-10 07:14:55,938 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 5304 transitions. Word has length 111 [2022-01-10 07:14:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:55,938 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 5304 transitions. [2022-01-10 07:14:55,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 07:14:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 5304 transitions. [2022-01-10 07:14:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:14:55,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:55,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:55,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:56,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:56,149 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1682707931, now seen corresponding path program 1 times [2022-01-10 07:14:56,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550762891] [2022-01-10 07:14:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:56,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:56,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:56,151 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:56,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 07:14:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 07:14:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 31 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:58,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:59,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550762891] [2022-01-10 07:14:59,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550762891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:59,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:59,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2022-01-10 07:14:59,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29096746] [2022-01-10 07:14:59,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 07:14:59,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 07:14:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 07:14:59,998 INFO L87 Difference]: Start difference. First operand 4343 states and 5304 transitions. Second operand has 42 states, 42 states have (on average 5.071428571428571) internal successors, (213), 42 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 07:15:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:01,171 INFO L93 Difference]: Finished difference Result 5720 states and 6971 transitions. [2022-01-10 07:15:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 07:15:01,172 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.071428571428571) internal successors, (213), 42 states have internal predecessors, (213), 0 states have call successors, (0), 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 111 [2022-01-10 07:15:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:01,178 INFO L225 Difference]: With dead ends: 5720 [2022-01-10 07:15:01,178 INFO L226 Difference]: Without dead ends: 5514 [2022-01-10 07:15:01,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 07:15:01,179 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 348 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:01,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 2627 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 477 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-01-10 07:15:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2022-01-10 07:15:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 4331. [2022-01-10 07:15:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 1.2214780600461894) internal successors, (5289), 4330 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states 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 07:15:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 5289 transitions. [2022-01-10 07:15:01,494 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 5289 transitions. Word has length 111 [2022-01-10 07:15:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:01,495 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 5289 transitions. [2022-01-10 07:15:01,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.071428571428571) internal successors, (213), 42 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 07:15:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 5289 transitions. [2022-01-10 07:15:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:15:01,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:01,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 07:15:01,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-01-10 07:15:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:01,703 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1040203591, now seen corresponding path program 1 times [2022-01-10 07:15:01,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178625883] [2022-01-10 07:15:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:01,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:01,705 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:01,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 07:15:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:15:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 07:15:02,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:15:02,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178625883] [2022-01-10 07:15:02,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178625883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:15:02,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:15:02,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:15:02,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507497905] [2022-01-10 07:15:02,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:15:02,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:15:02,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:15:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:15:02,238 INFO L87 Difference]: Start difference. First operand 4331 states and 5289 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 07:15:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:02,664 INFO L93 Difference]: Finished difference Result 8997 states and 11084 transitions. [2022-01-10 07:15:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 111 [2022-01-10 07:15:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:02,672 INFO L225 Difference]: With dead ends: 8997 [2022-01-10 07:15:02,672 INFO L226 Difference]: Without dead ends: 6048 [2022-01-10 07:15:02,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:02,675 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:02,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 192 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-10 07:15:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2022-01-10 07:15:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 6006. [2022-01-10 07:15:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2238134887593672) internal successors, (7349), 6005 states have internal predecessors, (7349), 0 states have call successors, (0), 0 states 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 07:15:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7349 transitions. [2022-01-10 07:15:03,103 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7349 transitions. Word has length 111 [2022-01-10 07:15:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:03,104 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 7349 transitions. [2022-01-10 07:15:03,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 07:15:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7349 transitions. [2022-01-10 07:15:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 07:15:03,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:03,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:03,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:03,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:03,312 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1416160080, now seen corresponding path program 1 times [2022-01-10 07:15:03,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769126986] [2022-01-10 07:15:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:03,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:03,314 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 07:15:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:15:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 22 proven. 48 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 07:15:04,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 22 proven. 48 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 07:15:04,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769126986] [2022-01-10 07:15:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769126986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:04,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:04,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:15:04,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554365383] [2022-01-10 07:15:04,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:04,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:15:04,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:15:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:15:04,524 INFO L87 Difference]: Start difference. First operand 6006 states and 7349 transitions. Second operand has 16 states, 16 states have (on average 11.5) internal successors, (184), 15 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 07:15:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:05,326 INFO L93 Difference]: Finished difference Result 11309 states and 13920 transitions. [2022-01-10 07:15:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 07:15:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.5) internal successors, (184), 15 states have internal predecessors, (184), 0 states have call successors, (0), 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 111 [2022-01-10 07:15:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:05,336 INFO L225 Difference]: With dead ends: 11309 [2022-01-10 07:15:05,337 INFO L226 Difference]: Without dead ends: 8623 [2022-01-10 07:15:05,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-10 07:15:05,345 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 282 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:05,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 722 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 138 Unchecked, 0.0s Time] [2022-01-10 07:15:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8623 states. [2022-01-10 07:15:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8623 to 8577. [2022-01-10 07:15:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8577 states, 8576 states have (on average 1.2203824626865671) internal successors, (10466), 8576 states have internal predecessors, (10466), 0 states have call successors, (0), 0 states 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 07:15:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8577 states to 8577 states and 10466 transitions. [2022-01-10 07:15:06,038 INFO L78 Accepts]: Start accepts. Automaton has 8577 states and 10466 transitions. Word has length 111 [2022-01-10 07:15:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 8577 states and 10466 transitions. [2022-01-10 07:15:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5) internal successors, (184), 15 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 07:15:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8577 states and 10466 transitions. [2022-01-10 07:15:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 07:15:06,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:06,042 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:06,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:06,249 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -438881537, now seen corresponding path program 1 times [2022-01-10 07:15:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:06,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845263479] [2022-01-10 07:15:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:06,251 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 07:15:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:07,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845263479] [2022-01-10 07:15:07,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845263479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:07,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:07,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-01-10 07:15:07,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810288292] [2022-01-10 07:15:07,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:07,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 07:15:07,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 07:15:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-10 07:15:07,471 INFO L87 Difference]: Start difference. First operand 8577 states and 10466 transitions. Second operand has 23 states, 23 states have (on average 9.173913043478262) internal successors, (211), 23 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 07:15:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:09,031 INFO L93 Difference]: Finished difference Result 17542 states and 21631 transitions. [2022-01-10 07:15:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 07:15:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.173913043478262) internal successors, (211), 23 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 112 [2022-01-10 07:15:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:09,050 INFO L225 Difference]: With dead ends: 17542 [2022-01-10 07:15:09,050 INFO L226 Difference]: Without dead ends: 16222 [2022-01-10 07:15:09,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 07:15:09,055 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 462 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:09,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1916 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-01-10 07:15:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16222 states. [2022-01-10 07:15:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16222 to 16049. [2022-01-10 07:15:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16049 states, 16048 states have (on average 1.2285643070787637) internal successors, (19716), 16048 states have internal predecessors, (19716), 0 states have call successors, (0), 0 states 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 07:15:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16049 states to 16049 states and 19716 transitions. [2022-01-10 07:15:10,342 INFO L78 Accepts]: Start accepts. Automaton has 16049 states and 19716 transitions. Word has length 112 [2022-01-10 07:15:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:10,343 INFO L470 AbstractCegarLoop]: Abstraction has 16049 states and 19716 transitions. [2022-01-10 07:15:10,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.173913043478262) internal successors, (211), 23 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 07:15:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16049 states and 19716 transitions. [2022-01-10 07:15:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 07:15:10,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:10,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:10,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:10,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:10,552 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1181769735, now seen corresponding path program 1 times [2022-01-10 07:15:10,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:10,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252860550] [2022-01-10 07:15:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:10,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:10,556 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 07:15:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 07:15:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:15,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252860550] [2022-01-10 07:15:15,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252860550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:15,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:15,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2022-01-10 07:15:15,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303776946] [2022-01-10 07:15:15,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:15,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-10 07:15:15,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-10 07:15:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2635, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 07:15:15,777 INFO L87 Difference]: Start difference. First operand 16049 states and 19716 transitions. Second operand has 55 states, 55 states have (on average 3.8181818181818183) internal successors, (210), 55 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 07:15:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:18,002 INFO L93 Difference]: Finished difference Result 18617 states and 22750 transitions. [2022-01-10 07:15:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 07:15:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8181818181818183) internal successors, (210), 55 states have internal predecessors, (210), 0 states have call successors, (0), 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 112 [2022-01-10 07:15:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:18,023 INFO L225 Difference]: With dead ends: 18617 [2022-01-10 07:15:18,023 INFO L226 Difference]: Without dead ends: 16829 [2022-01-10 07:15:18,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=476, Invalid=3184, Unknown=0, NotChecked=0, Total=3660 [2022-01-10 07:15:18,029 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 369 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:18,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1938 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-01-10 07:15:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16829 states. [2022-01-10 07:15:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16829 to 16015. [2022-01-10 07:15:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16015 states, 16014 states have (on average 1.2286124640939178) internal successors, (19675), 16014 states have internal predecessors, (19675), 0 states have call successors, (0), 0 states 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 07:15:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16015 states to 16015 states and 19675 transitions. [2022-01-10 07:15:19,280 INFO L78 Accepts]: Start accepts. Automaton has 16015 states and 19675 transitions. Word has length 112 [2022-01-10 07:15:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:19,280 INFO L470 AbstractCegarLoop]: Abstraction has 16015 states and 19675 transitions. [2022-01-10 07:15:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8181818181818183) internal successors, (210), 55 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 07:15:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 16015 states and 19675 transitions. [2022-01-10 07:15:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 07:15:19,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:19,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:19,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:19,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:19,484 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1237323942, now seen corresponding path program 1 times [2022-01-10 07:15:19,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:19,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253358007] [2022-01-10 07:15:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:19,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:19,485 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:19,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 07:15:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 07:15:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates...