/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/eca-rers2012/Problem14_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:16:25,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:16:25,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:16:25,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:16:25,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 05:16:25,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 05:16:25,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 05:16:25,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 05:16:25,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:16:25,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:16:25,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:16:25,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:16:25,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:16:25,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:16:25,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:16:25,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:16:25,692 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:16:25,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:16:25,693 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:16:25,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:16:25,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:16:25,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:16:25,695 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:16:25,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:16:25,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:16:25,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:16:25,915 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:16:25,917 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:16:25,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2022-01-10 05:16:25,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa38ad768/4befe3537a6348f6b4894b23db400406/FLAG8505ff39c [2022-01-10 05:16:26,312 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:16:26,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2022-01-10 05:16:26,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa38ad768/4befe3537a6348f6b4894b23db400406/FLAG8505ff39c [2022-01-10 05:16:26,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa38ad768/4befe3537a6348f6b4894b23db400406 [2022-01-10 05:16:26,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:16:26,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:16:26,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:16:26,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:16:26,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:16:26,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:16:26" (1/1) ... [2022-01-10 05:16:26,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b007e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:26, skipping insertion in model container [2022-01-10 05:16:26,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:16:26" (1/1) ... [2022-01-10 05:16:26,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:16:26,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:16:26,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21.c[3617,3630] [2022-01-10 05:16:27,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:16:27,102 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:16:27,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21.c[3617,3630] [2022-01-10 05:16:27,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:16:27,207 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:16:27,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27 WrapperNode [2022-01-10 05:16:27,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:16:27,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:16:27,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:16:27,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:16:27,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,279 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2022-01-10 05:16:27,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:16:27,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:16:27,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:16:27,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:16:27,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:16:27,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:16:27,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:16:27,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:16:27,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (1/1) ... [2022-01-10 05:16:27,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:16:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:16:27,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 05:16:27,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 05:16:27,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:16:27,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:16:27,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:16:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:16:27,452 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:16:27,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:16:29,500 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:16:29,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:16:29,507 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:16:29,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:16:29 BoogieIcfgContainer [2022-01-10 05:16:29,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:16:29,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:16:29,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:16:29,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:16:29,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:16:26" (1/3) ... [2022-01-10 05:16:29,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3accc3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:16:29, skipping insertion in model container [2022-01-10 05:16:29,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:16:27" (2/3) ... [2022-01-10 05:16:29,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3accc3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:16:29, skipping insertion in model container [2022-01-10 05:16:29,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:16:29" (3/3) ... [2022-01-10 05:16:29,515 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label21.c [2022-01-10 05:16:29,520 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:16:29,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:16:29,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:16:29,587 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 05:16:29,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:16:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 05:16:29,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:29,635 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] [2022-01-10 05:16:29,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2022-01-10 05:16:29,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:29,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693651095] [2022-01-10 05:16:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:29,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:29,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:29,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 05:16:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:29,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:29,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693651095] [2022-01-10 05:16:29,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693651095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:29,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:29,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:29,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594624523] [2022-01-10 05:16:29,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:29,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:29,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:29,896 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:32,683 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-01-10 05:16:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-10 05:16:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:32,693 INFO L225 Difference]: With dead ends: 669 [2022-01-10 05:16:32,694 INFO L226 Difference]: Without dead ends: 360 [2022-01-10 05:16:32,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:32,699 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:32,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 132 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 05:16:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-10 05:16:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-10 05:16:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4540389972144847) internal successors, (522), 359 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 522 transitions. [2022-01-10 05:16:32,745 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 522 transitions. Word has length 34 [2022-01-10 05:16:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:32,746 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 522 transitions. [2022-01-10 05:16:32,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 522 transitions. [2022-01-10 05:16:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 05:16:32,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:32,749 INFO L514 BasicCegarLoop]: trace histogram [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, 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 05:16:32,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:32,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:32,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 22069033, now seen corresponding path program 1 times [2022-01-10 05:16:32,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:32,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009065164] [2022-01-10 05:16:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:32,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:32,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:32,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 05:16:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:33,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:33,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009065164] [2022-01-10 05:16:33,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009065164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:33,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:33,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286556633] [2022-01-10 05:16:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:33,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:33,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:33,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:33,215 INFO L87 Difference]: Start difference. First operand 360 states and 522 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:35,941 INFO L93 Difference]: Finished difference Result 1074 states and 1561 transitions. [2022-01-10 05:16:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-01-10 05:16:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:35,944 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 05:16:35,944 INFO L226 Difference]: Without dead ends: 716 [2022-01-10 05:16:35,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:35,946 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 05:16:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-10 05:16:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-01-10 05:16:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2022-01-10 05:16:35,986 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 100 [2022-01-10 05:16:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2022-01-10 05:16:35,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2022-01-10 05:16:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 05:16:35,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:35,989 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-10 05:16:35,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:36,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1842413572, now seen corresponding path program 1 times [2022-01-10 05:16:36,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345867099] [2022-01-10 05:16:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:36,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:36,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:36,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:36,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 05:16:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:16:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:36,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:36,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345867099] [2022-01-10 05:16:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345867099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:36,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:36,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:36,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335044964] [2022-01-10 05:16:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:36,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:36,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:36,419 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:38,995 INFO L93 Difference]: Finished difference Result 1966 states and 2656 transitions. [2022-01-10 05:16:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2022-01-10 05:16:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:38,999 INFO L225 Difference]: With dead ends: 1966 [2022-01-10 05:16:38,999 INFO L226 Difference]: Without dead ends: 1252 [2022-01-10 05:16:39,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:39,002 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:39,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 88 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 05:16:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-01-10 05:16:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1250. [2022-01-10 05:16:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2465972778222578) internal successors, (1557), 1249 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1557 transitions. [2022-01-10 05:16:39,024 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1557 transitions. Word has length 102 [2022-01-10 05:16:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:39,024 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1557 transitions. [2022-01-10 05:16:39,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1557 transitions. [2022-01-10 05:16:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 05:16:39,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:39,025 INFO L514 BasicCegarLoop]: trace histogram [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, 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 05:16:39,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:39,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:39,232 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1896681766, now seen corresponding path program 1 times [2022-01-10 05:16:39,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521958141] [2022-01-10 05:16:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:39,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:39,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:39,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 05:16:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:16:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:16:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:16:40,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521958141] [2022-01-10 05:16:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521958141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:16:40,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:16:40,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 05:16:40,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781684482] [2022-01-10 05:16:40,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:16:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:16:40,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:16:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:16:40,127 INFO L87 Difference]: Start difference. First operand 1250 states and 1557 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:46,984 INFO L93 Difference]: Finished difference Result 2912 states and 3810 transitions. [2022-01-10 05:16:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 05:16:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 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 114 [2022-01-10 05:16:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:46,995 INFO L225 Difference]: With dead ends: 2912 [2022-01-10 05:16:46,995 INFO L226 Difference]: Without dead ends: 1842 [2022-01-10 05:16:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-10 05:16:46,997 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1029 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:46,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 138 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-10 05:16:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-01-10 05:16:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1428. [2022-01-10 05:16:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.2200420462508759) internal successors, (1741), 1427 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1741 transitions. [2022-01-10 05:16:47,016 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1741 transitions. Word has length 114 [2022-01-10 05:16:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:47,016 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1741 transitions. [2022-01-10 05:16:47,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1741 transitions. [2022-01-10 05:16:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 05:16:47,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:47,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-01-10 05:16:47,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:47,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:47,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1303628737, now seen corresponding path program 1 times [2022-01-10 05:16:47,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:47,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236892141] [2022-01-10 05:16:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:47,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:47,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:47,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:47,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 05:16:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:47,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:16:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 05:16:47,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:47,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:47,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236892141] [2022-01-10 05:16:47,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236892141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:47,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:47,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:16:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546726726] [2022-01-10 05:16:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:47,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:16:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:16:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:16:47,780 INFO L87 Difference]: Start difference. First operand 1428 states and 1741 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:49,716 INFO L93 Difference]: Finished difference Result 2883 states and 3521 transitions. [2022-01-10 05:16:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:16:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-01-10 05:16:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:49,721 INFO L225 Difference]: With dead ends: 2883 [2022-01-10 05:16:49,721 INFO L226 Difference]: Without dead ends: 1606 [2022-01-10 05:16:49,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:16:49,723 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:49,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 05:16:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-01-10 05:16:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2022-01-10 05:16:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1975077881619938) internal successors, (1922), 1605 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1922 transitions. [2022-01-10 05:16:49,741 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1922 transitions. Word has length 193 [2022-01-10 05:16:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:49,742 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1922 transitions. [2022-01-10 05:16:49,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1922 transitions. [2022-01-10 05:16:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-01-10 05:16:49,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:49,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 05:16:49,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:49,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:49,957 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash -935595540, now seen corresponding path program 1 times [2022-01-10 05:16:49,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:49,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113160214] [2022-01-10 05:16:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:49,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:49,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 05:16:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:16:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 05:16:50,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:16:50,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:50,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113160214] [2022-01-10 05:16:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113160214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:16:50,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:16:50,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:16:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762065850] [2022-01-10 05:16:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:50,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:50,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:50,886 INFO L87 Difference]: Start difference. First operand 1606 states and 1922 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:16:52,798 INFO L93 Difference]: Finished difference Result 2854 states and 3477 transitions. [2022-01-10 05:16:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:16:52,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 288 [2022-01-10 05:16:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:16:52,802 INFO L225 Difference]: With dead ends: 2854 [2022-01-10 05:16:52,802 INFO L226 Difference]: Without dead ends: 1606 [2022-01-10 05:16:52,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:16:52,804 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 05:16:52,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 05:16:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-01-10 05:16:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2022-01-10 05:16:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1937694704049844) internal successors, (1916), 1605 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1916 transitions. [2022-01-10 05:16:52,823 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1916 transitions. Word has length 288 [2022-01-10 05:16:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:16:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1916 transitions. [2022-01-10 05:16:52,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:16:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1916 transitions. [2022-01-10 05:16:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-10 05:16:52,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:16:52,828 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:16:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 05:16:53,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:16:53,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:16:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:16:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash 672863292, now seen corresponding path program 1 times [2022-01-10 05:16:53,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:16:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890268930] [2022-01-10 05:16:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:16:53,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:16:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:16:53,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:16:53,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 05:16:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:16:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:16:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:16:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 320 proven. 135 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 05:16:53,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:16:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 05:16:54,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:16:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890268930] [2022-01-10 05:16:54,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890268930] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:16:54,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:16:54,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:16:54,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563532466] [2022-01-10 05:16:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:16:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:16:54,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:16:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:16:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:16:54,665 INFO L87 Difference]: Start difference. First operand 1606 states and 1916 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:00,664 INFO L93 Difference]: Finished difference Result 3210 states and 4002 transitions. [2022-01-10 05:17:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 392 [2022-01-10 05:17:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:00,669 INFO L225 Difference]: With dead ends: 3210 [2022-01-10 05:17:00,669 INFO L226 Difference]: Without dead ends: 1962 [2022-01-10 05:17:00,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 779 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 05:17:00,671 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 135 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 57 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-01-10 05:17:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-01-10 05:17:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2022-01-10 05:17:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.2049974502804692) internal successors, (2363), 1961 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2363 transitions. [2022-01-10 05:17:00,696 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2363 transitions. Word has length 392 [2022-01-10 05:17:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:00,696 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2363 transitions. [2022-01-10 05:17:00,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2363 transitions. [2022-01-10 05:17:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-01-10 05:17:00,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:00,700 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-01-10 05:17:00,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 05:17:00,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:17:00,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1649118554, now seen corresponding path program 1 times [2022-01-10 05:17:00,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:00,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4460525] [2022-01-10 05:17:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:00,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:00,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:17:00,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 05:17:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:17:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 331 proven. 159 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 05:17:01,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-10 05:17:02,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4460525] [2022-01-10 05:17:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4460525] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:17:02,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:17:02,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:17:02,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370627366] [2022-01-10 05:17:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:02,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:02,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:02,767 INFO L87 Difference]: Start difference. First operand 1962 states and 2363 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:08,009 INFO L93 Difference]: Finished difference Result 4100 states and 5129 transitions. [2022-01-10 05:17:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:08,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 404 [2022-01-10 05:17:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:08,015 INFO L225 Difference]: With dead ends: 4100 [2022-01-10 05:17:08,015 INFO L226 Difference]: Without dead ends: 2496 [2022-01-10 05:17:08,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:08,017 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 114 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:08,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 214 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-10 05:17:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-01-10 05:17:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2022-01-10 05:17:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.22124248496994) internal successors, (3047), 2495 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3047 transitions. [2022-01-10 05:17:08,041 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3047 transitions. Word has length 404 [2022-01-10 05:17:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3047 transitions. [2022-01-10 05:17:08,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3047 transitions. [2022-01-10 05:17:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-10 05:17:08,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:08,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:08,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 05:17:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:17:08,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash 313193583, now seen corresponding path program 1 times [2022-01-10 05:17:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343430601] [2022-01-10 05:17:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:08,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:08,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:17:08,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 05:17:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 05:17:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 127 proven. 347 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-01-10 05:17:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-01-10 05:17:11,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343430601] [2022-01-10 05:17:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343430601] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:17:11,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:17:11,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:17:11,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725437833] [2022-01-10 05:17:11,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:11,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:11,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:11,502 INFO L87 Difference]: Start difference. First operand 2496 states and 3047 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:14,997 INFO L93 Difference]: Finished difference Result 4990 states and 6222 transitions. [2022-01-10 05:17:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 427 [2022-01-10 05:17:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:15,004 INFO L225 Difference]: With dead ends: 4990 [2022-01-10 05:17:15,004 INFO L226 Difference]: Without dead ends: 2852 [2022-01-10 05:17:15,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:15,006 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:15,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 27 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-10 05:17:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-01-10 05:17:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2022-01-10 05:17:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.212907751666082) internal successors, (3458), 2851 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3458 transitions. [2022-01-10 05:17:15,032 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3458 transitions. Word has length 427 [2022-01-10 05:17:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:15,033 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 3458 transitions. [2022-01-10 05:17:15,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3458 transitions. [2022-01-10 05:17:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-10 05:17:15,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:15,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:15,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 05:17:15,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:17:15,246 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -210766027, now seen corresponding path program 1 times [2022-01-10 05:17:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438411453] [2022-01-10 05:17:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:15,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:15,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:17:15,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 05:17:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:17:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 344 proven. 277 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-01-10 05:17:16,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 592 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-01-10 05:17:21,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438411453] [2022-01-10 05:17:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438411453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:17:21,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:17:21,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 05:17:21,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467708394] [2022-01-10 05:17:21,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:17:21,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:17:21,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:17:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:17:21,637 INFO L87 Difference]: Start difference. First operand 2852 states and 3458 transitions. Second operand has 7 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)