/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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:17:16,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:17:16,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:17:16,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:17:16,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 05:17:16,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 05:17:16,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 05:17:16,483 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 05:17:16,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:17:16,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:17:16,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:17:16,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:17:16,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:17:16,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:17:16,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:17:16,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:17:16,519 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:17:16,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:17:16,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:17:16,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:17:16,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:17:16,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:17:16,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:17:16,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:17:16,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:17:16,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:17:16,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:17:16,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:17:16,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:17:16,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:17:16,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:17:16,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:17:16,764 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:17:16,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label30.c [2022-01-10 05:17:16,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49f18da79/2954fce518694b52a938f314bac30537/FLAGa69c42153 [2022-01-10 05:17:17,275 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:17:17,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label30.c [2022-01-10 05:17:17,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49f18da79/2954fce518694b52a938f314bac30537/FLAGa69c42153 [2022-01-10 05:17:17,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49f18da79/2954fce518694b52a938f314bac30537 [2022-01-10 05:17:17,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:17:17,302 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:17:17,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:17:17,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:17:17,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:17:17,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40db3b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17, skipping insertion in model container [2022-01-10 05:17:17,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:17:17,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:17:17,633 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_label30.c[4533,4546] [2022-01-10 05:17:17,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:17:17,800 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:17:17,816 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_label30.c[4533,4546] [2022-01-10 05:17:17,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:17:17,882 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:17:17,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17 WrapperNode [2022-01-10 05:17:17,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:17:17,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:17:17,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:17:17,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:17:17,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,968 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2022-01-10 05:17:17,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:17:17,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:17:17,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:17:17,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:17:17,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:17,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:18,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:18,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:18,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:18,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:17:18,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:17:18,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:17:18,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:17:18,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (1/1) ... [2022-01-10 05:17:18,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:17:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:17:18,104 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 05:17:18,128 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 05:17:18,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:17:18,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:17:18,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:17:18,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:17:18,206 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:17:18,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:17:20,708 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:17:20,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:17:20,720 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:17:20,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:17:20 BoogieIcfgContainer [2022-01-10 05:17:20,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:17:20,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:17:20,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:17:20,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:17:20,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:17:17" (1/3) ... [2022-01-10 05:17:20,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac75ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:17:20, skipping insertion in model container [2022-01-10 05:17:20,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:17:17" (2/3) ... [2022-01-10 05:17:20,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac75ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:17:20, skipping insertion in model container [2022-01-10 05:17:20,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:17:20" (3/3) ... [2022-01-10 05:17:20,730 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label30.c [2022-01-10 05:17:20,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:17:20,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:17:20,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:17:20,806 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 05:17:20,807 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:17:20,824 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 05:17:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 05:17:20,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:20,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:20,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2022-01-10 05:17:20,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:20,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646005960] [2022-01-10 05:17:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:20,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:20,850 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 05:17:20,851 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 05:17:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:17:20,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:21,080 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 05:17:21,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:17:21,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:21,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646005960] [2022-01-10 05:17:21,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646005960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:17:21,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:17:21,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:17:21,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548692248] [2022-01-10 05:17:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:21,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:21,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:17:21,120 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:23,759 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-01-10 05:17:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 05:17:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:23,771 INFO L225 Difference]: With dead ends: 669 [2022-01-10 05:17:23,771 INFO L226 Difference]: Without dead ends: 360 [2022-01-10 05:17:23,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 05:17:23,777 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:23,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 05:17:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-10 05:17:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-10 05:17:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4874651810584958) internal successors, (534), 359 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 05:17:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 534 transitions. [2022-01-10 05:17:23,826 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 534 transitions. Word has length 43 [2022-01-10 05:17:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 534 transitions. [2022-01-10 05:17:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 534 transitions. [2022-01-10 05:17:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 05:17:23,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:23,830 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:23,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 05:17:24,038 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 05:17:24,039 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash 155117996, now seen corresponding path program 1 times [2022-01-10 05:17:24,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:24,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288848897] [2022-01-10 05:17:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:24,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:24,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:24,042 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 05:17:24,043 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 05:17:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:17:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:17:24,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:17:24,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288848897] [2022-01-10 05:17:24,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288848897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:17:24,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:17:24,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:17:24,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827602437] [2022-01-10 05:17:24,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:24,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:17:24,343 INFO L87 Difference]: Start difference. First operand 360 states and 534 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:26,754 INFO L93 Difference]: Finished difference Result 1074 states and 1597 transitions. [2022-01-10 05:17:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-01-10 05:17:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:26,759 INFO L225 Difference]: With dead ends: 1074 [2022-01-10 05:17:26,759 INFO L226 Difference]: Without dead ends: 716 [2022-01-10 05:17:26,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 05:17:26,761 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 116 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:26,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 101 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 05:17:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-10 05:17:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-01-10 05:17:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3468531468531468) internal successors, (963), 715 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 05:17:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 963 transitions. [2022-01-10 05:17:26,826 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 963 transitions. Word has length 108 [2022-01-10 05:17:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 963 transitions. [2022-01-10 05:17:26,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:17:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 963 transitions. [2022-01-10 05:17:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 05:17:26,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:26,834 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, 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] [2022-01-10 05:17:26,847 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 05:17:27,043 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 05:17:27,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1247160598, now seen corresponding path program 1 times [2022-01-10 05:17:27,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006055871] [2022-01-10 05:17:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:27,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:27,047 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 05:17:27,048 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 05:17:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:17:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:17:27,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:17:27,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006055871] [2022-01-10 05:17:27,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006055871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:17:27,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:17:27,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:17:27,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257955301] [2022-01-10 05:17:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:27,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:27,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:17:27,321 INFO L87 Difference]: Start difference. First operand 716 states and 963 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 05:17:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:29,735 INFO L93 Difference]: Finished difference Result 1964 states and 2657 transitions. [2022-01-10 05:17:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 05:17:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:29,741 INFO L225 Difference]: With dead ends: 1964 [2022-01-10 05:17:29,741 INFO L226 Difference]: Without dead ends: 1250 [2022-01-10 05:17:29,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 05:17:29,743 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:29,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 05:17:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-10 05:17:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-01-10 05:17:29,762 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 05:17:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1557 transitions. [2022-01-10 05:17:29,765 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1557 transitions. Word has length 111 [2022-01-10 05:17:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1557 transitions. [2022-01-10 05:17:29,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 05:17:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1557 transitions. [2022-01-10 05:17:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-10 05:17:29,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:29,769 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:29,780 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 05:17:29,977 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 05:17:29,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 729557443, now seen corresponding path program 1 times [2022-01-10 05:17:29,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256740442] [2022-01-10 05:17:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:29,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:29,981 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 05:17:29,983 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 05:17:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:30,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 05:17:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 05:17:30,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:17:30,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:30,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256740442] [2022-01-10 05:17:30,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256740442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:17:30,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:17:30,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:17:30,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777851640] [2022-01-10 05:17:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:30,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:17:30,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:17:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:17:30,739 INFO L87 Difference]: Start difference. First operand 1250 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:17:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:32,981 INFO L93 Difference]: Finished difference Result 2171 states and 2743 transitions. [2022-01-10 05:17:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:17:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 192 [2022-01-10 05:17:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:32,986 INFO L225 Difference]: With dead ends: 2171 [2022-01-10 05:17:32,986 INFO L226 Difference]: Without dead ends: 1072 [2022-01-10 05:17:32,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 189 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 05:17:32,991 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:32,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 05:17:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-10 05:17:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-10 05:17:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2399626517273576) internal successors, (1328), 1071 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states 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 05:17:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1328 transitions. [2022-01-10 05:17:33,008 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1328 transitions. Word has length 192 [2022-01-10 05:17:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:33,009 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1328 transitions. [2022-01-10 05:17:33,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:17:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1328 transitions. [2022-01-10 05:17:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-10 05:17:33,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:33,012 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:17:33,026 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 05:17:33,223 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 05:17:33,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 45604706, now seen corresponding path program 1 times [2022-01-10 05:17:33,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981066482] [2022-01-10 05:17:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:33,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:33,229 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 05:17:33,231 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 05:17:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:17:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 05:17:34,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:17:34,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981066482] [2022-01-10 05:17:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981066482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:17:34,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:17:34,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:17:34,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405682094] [2022-01-10 05:17:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:17:34,224 INFO L87 Difference]: Start difference. First operand 1072 states and 1328 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 05:17:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:36,099 INFO L93 Difference]: Finished difference Result 1786 states and 2289 transitions. [2022-01-10 05:17:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 218 [2022-01-10 05:17:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:36,103 INFO L225 Difference]: With dead ends: 1786 [2022-01-10 05:17:36,103 INFO L226 Difference]: Without dead ends: 1072 [2022-01-10 05:17:36,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 216 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 05:17:36,106 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 05:17:36,107 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 05:17:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-10 05:17:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-10 05:17:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2343604108309991) internal successors, (1322), 1071 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states 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 05:17:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1322 transitions. [2022-01-10 05:17:36,125 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1322 transitions. Word has length 218 [2022-01-10 05:17:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:36,126 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1322 transitions. [2022-01-10 05:17:36,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 05:17:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1322 transitions. [2022-01-10 05:17:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-10 05:17:36,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:36,130 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, 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, 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, 1] [2022-01-10 05:17:36,143 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 05:17:36,341 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 05:17:36,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -609783567, now seen corresponding path program 1 times [2022-01-10 05:17:36,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:36,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488023081] [2022-01-10 05:17:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:36,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:36,344 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 05:17:36,345 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 05:17:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:36,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:17:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 122 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:17:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 05:17:37,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488023081] [2022-01-10 05:17:37,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488023081] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:17:37,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:17:37,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:17:37,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912705150] [2022-01-10 05:17:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:37,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:37,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:37,733 INFO L87 Difference]: Start difference. First operand 1072 states and 1322 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 05:17:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:42,568 INFO L93 Difference]: Finished difference Result 2142 states and 2814 transitions. [2022-01-10 05:17:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 322 [2022-01-10 05:17:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:42,573 INFO L225 Difference]: With dead ends: 2142 [2022-01-10 05:17:42,573 INFO L226 Difference]: Without dead ends: 1428 [2022-01-10 05:17:42,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 639 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 05:17:42,575 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:42,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-10 05:17:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-01-10 05:17:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2022-01-10 05:17:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.2389628591450597) internal successors, (1768), 1427 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 05:17:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1768 transitions. [2022-01-10 05:17:42,596 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1768 transitions. Word has length 322 [2022-01-10 05:17:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:42,597 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1768 transitions. [2022-01-10 05:17:42,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 05:17:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1768 transitions. [2022-01-10 05:17:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-01-10 05:17:42,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:42,603 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:42,619 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 05:17:42,814 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 05:17:42,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1169306701, now seen corresponding path program 1 times [2022-01-10 05:17:42,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900062040] [2022-01-10 05:17:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:42,817 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 05:17:42,818 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 05:17:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:17:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 399 proven. 159 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-10 05:17:43,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-10 05:17:44,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900062040] [2022-01-10 05:17:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900062040] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 05:17:44,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 05:17:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 05:17:44,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519033077] [2022-01-10 05:17:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:17:44,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:17:44,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:17:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 05:17:44,658 INFO L87 Difference]: Start difference. First operand 1428 states and 1768 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 05:17:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:17:49,158 INFO L93 Difference]: Finished difference Result 3210 states and 4153 transitions. [2022-01-10 05:17:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:17:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 433 [2022-01-10 05:17:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:17:49,165 INFO L225 Difference]: With dead ends: 3210 [2022-01-10 05:17:49,165 INFO L226 Difference]: Without dead ends: 2140 [2022-01-10 05:17:49,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 861 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 05:17:49,167 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-10 05:17:49,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-10 05:17:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-01-10 05:17:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2022-01-10 05:17:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2473118279569892) internal successors, (2668), 2139 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states 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 05:17:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2668 transitions. [2022-01-10 05:17:49,201 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2668 transitions. Word has length 433 [2022-01-10 05:17:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:17:49,202 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2668 transitions. [2022-01-10 05:17:49,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 05:17:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2668 transitions. [2022-01-10 05:17:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-01-10 05:17:49,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:17:49,209 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, 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:17:49,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 05:17:49,419 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 05:17:49,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:17:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:17:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 455758475, now seen corresponding path program 1 times [2022-01-10 05:17:49,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:17:49,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931741963] [2022-01-10 05:17:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:17:49,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:17:49,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:17:49,424 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 05:17:49,451 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 05:17:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:17:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 05:17:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:17:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 358 proven. 277 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 05:17:50,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:17:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 606 proven. 29 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 05:17:56,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:17:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931741963] [2022-01-10 05:17:56,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931741963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:17:56,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:17:56,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 05:17:56,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132202903] [2022-01-10 05:17:56,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:17:56,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 05:17:56,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:17:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 05:17:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:17:56,285 INFO L87 Difference]: Start difference. First operand 2140 states and 2668 transitions. Second operand has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:18:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:18:21,492 INFO L93 Difference]: Finished difference Result 5640 states and 7171 transitions. [2022-01-10 05:18:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 05:18:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2022-01-10 05:18:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:18:21,504 INFO L225 Difference]: With dead ends: 5640 [2022-01-10 05:18:21,504 INFO L226 Difference]: Without dead ends: 3742 [2022-01-10 05:18:21,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 05:18:21,507 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 445 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2022-01-10 05:18:21,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 52 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2022-01-10 05:18:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-01-10 05:18:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3742. [2022-01-10 05:18:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.1093290564020315) internal successors, (4150), 3741 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states 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 05:18:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4150 transitions. [2022-01-10 05:18:21,584 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4150 transitions. Word has length 449 [2022-01-10 05:18:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:18:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 3742 states and 4150 transitions. [2022-01-10 05:18:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:18:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4150 transitions. [2022-01-10 05:18:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2022-01-10 05:18:21,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:18:21,590 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 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 05:18:21,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 05:18:21,801 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 05:18:21,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:18:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:18:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash 580737947, now seen corresponding path program 1 times [2022-01-10 05:18:21,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:18:21,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615257523] [2022-01-10 05:18:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:18:21,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:18:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:18:21,805 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 05:18:21,806 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 05:18:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:18:21,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 05:18:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates...