/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:37:35,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:37:35,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:37:35,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:37:35,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:37:35,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:37:35,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:37:35,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:37:35,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:37:35,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:37:35,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:37:35,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:37:35,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:37:35,785 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:37:35,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:37:35,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:37:35,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:37:35,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:37:35,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:37:35,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:35,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:37:35,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:37:35,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:37:35,789 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:37:35,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:37:36,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:37:36,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:37:36,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:37:36,020 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:37:36,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2022-01-10 06:37:36,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f73d7c95e/4a7697c66e0544e3aa5e8fe1655d2d2f/FLAGc92065ae1 [2022-01-10 06:37:36,453 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:37:36,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2022-01-10 06:37:36,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f73d7c95e/4a7697c66e0544e3aa5e8fe1655d2d2f/FLAGc92065ae1 [2022-01-10 06:37:36,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f73d7c95e/4a7697c66e0544e3aa5e8fe1655d2d2f [2022-01-10 06:37:36,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:37:36,468 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:37:36,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:36,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:37:36,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:37:36,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c17dbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36, skipping insertion in model container [2022-01-10 06:37:36,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:37:36,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:37:36,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c[745,758] [2022-01-10 06:37:36,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:36,614 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:37:36,623 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c[745,758] [2022-01-10 06:37:36,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:36,659 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:37:36,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36 WrapperNode [2022-01-10 06:37:36,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:36,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:36,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:37:36,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:37:36,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,712 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:37:36,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:36,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:37:36,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:37:36,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:37:36,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:37:36,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:37:36,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:37:36,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:37:36,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (1/1) ... [2022-01-10 06:37:36,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:37:36,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:37:36,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:37:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:37:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:37:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:37:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:37:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 06:37:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 06:37:36,872 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:37:36,873 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:37:36,939 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:37:36,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:37:36,943 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:37:36,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:36 BoogieIcfgContainer [2022-01-10 06:37:36,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:37:36,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:37:36,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:37:36,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:37:36,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:37:36" (1/3) ... [2022-01-10 06:37:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce4085e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:36, skipping insertion in model container [2022-01-10 06:37:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:36" (2/3) ... [2022-01-10 06:37:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce4085e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:36, skipping insertion in model container [2022-01-10 06:37:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:36" (3/3) ... [2022-01-10 06:37:36,949 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2022-01-10 06:37:36,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:37:36,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:37:36,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:37:36,984 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:37:36,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:37:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:37:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:37:36,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:36,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:36,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 795692101, now seen corresponding path program 1 times [2022-01-10 06:37:37,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:37,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912687639] [2022-01-10 06:37:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:37,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:37,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:37,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:37:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:37:37,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:37,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912687639] [2022-01-10 06:37:37,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912687639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:37,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:37,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:37,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115848233] [2022-01-10 06:37:37,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:37,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:37,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:37,203 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:37,254 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 06:37:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:37:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:37,262 INFO L225 Difference]: With dead ends: 29 [2022-01-10 06:37:37,262 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 06:37:37,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:37,267 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:37,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 06:37:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 06:37:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:37,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 06:37:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:37,294 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:37,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:37:37,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:37,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:37,305 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 06:37:37,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash -360006549, now seen corresponding path program 1 times [2022-01-10 06:37:37,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:37,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234893494] [2022-01-10 06:37:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:37,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:37,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:37,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:37:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:37:37,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:37,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:37,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234893494] [2022-01-10 06:37:37,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234893494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:37,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541835592] [2022-01-10 06:37:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:37,594 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:37,631 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 06:37:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:37,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:37:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:37,632 INFO L225 Difference]: With dead ends: 23 [2022-01-10 06:37:37,632 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 06:37:37,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:37,634 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:37,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 06:37:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 06:37:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:37,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 06:37:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:37,638 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:37,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:37:37,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:37,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:37,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:37,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,860 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1663150085, now seen corresponding path program 1 times [2022-01-10 06:37:37,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538061642] [2022-01-10 06:37:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:37,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:37,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:37:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:37:37,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:38,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538061642] [2022-01-10 06:37:38,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538061642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:38,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:38,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719995606] [2022-01-10 06:37:38,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:38,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:38,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:38,166 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:38,262 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-10 06:37:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:37:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:38,263 INFO L225 Difference]: With dead ends: 27 [2022-01-10 06:37:38,264 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:37:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:38,265 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:38,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:37:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-10 06:37:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:37:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 06:37:38,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 06:37:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:38,271 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 06:37:38,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 06:37:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:37:38,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:38,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:38,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 17297569, now seen corresponding path program 1 times [2022-01-10 06:37:38,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:38,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180941453] [2022-01-10 06:37:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:38,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:38,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:38,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:38,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:37:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:37:38,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:38,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:38,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180941453] [2022-01-10 06:37:38,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180941453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:38,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:38,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:38,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219517908] [2022-01-10 06:37:38,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:38,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:38,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:38,778 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:38,857 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-01-10 06:37:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:37:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:38,861 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:37:38,861 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:37:38,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:38,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:38,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:37:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:37:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:37:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2022-01-10 06:37:38,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 23 [2022-01-10 06:37:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:38,878 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2022-01-10 06:37:38,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2022-01-10 06:37:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:37:38,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:38,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:38,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:39,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:39,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -310195131, now seen corresponding path program 2 times [2022-01-10 06:37:39,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171740578] [2022-01-10 06:37:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:39,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:39,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:37:39,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:37:39,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:39,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171740578] [2022-01-10 06:37:39,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171740578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:39,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:39,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:39,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005255761] [2022-01-10 06:37:39,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:39,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:39,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:39,588 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:39,739 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2022-01-10 06:37:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 34 [2022-01-10 06:37:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:39,742 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:37:39,742 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 06:37:39,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:39,743 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:39,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 06:37:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-10 06:37:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:37:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 06:37:39,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 34 [2022-01-10 06:37:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:39,752 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 06:37:39,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 06:37:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:37:39,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:39,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:39,759 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 06:37:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:39,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -441896069, now seen corresponding path program 2 times [2022-01-10 06:37:39,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:39,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861135641] [2022-01-10 06:37:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:39,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:39,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:37:39,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:37:40,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:40,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:40,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861135641] [2022-01-10 06:37:40,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861135641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:40,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:40,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:40,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072018028] [2022-01-10 06:37:40,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:40,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:40,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:40,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:40,297 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:40,396 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 06:37:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:37:40,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2022-01-10 06:37:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:40,398 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:37:40,398 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:40,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:37:40,399 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:40,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 06:37:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:37:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2022-01-10 06:37:40,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 36 [2022-01-10 06:37:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:40,404 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2022-01-10 06:37:40,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2022-01-10 06:37:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:37:40,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:40,406 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:40,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:40,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:40,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash -104523349, now seen corresponding path program 3 times [2022-01-10 06:37:40,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:40,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512322474] [2022-01-10 06:37:40,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:40,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:40,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:40,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:40,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:37:40,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:37:40,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:37:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 06:37:40,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 06:37:41,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512322474] [2022-01-10 06:37:41,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512322474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:41,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:41,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 06:37:41,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565738764] [2022-01-10 06:37:41,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:41,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:37:41,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:37:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:41,290 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:41,403 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-01-10 06:37:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:37:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 83 [2022-01-10 06:37:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:41,407 INFO L225 Difference]: With dead ends: 66 [2022-01-10 06:37:41,407 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 06:37:41,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:41,411 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:41,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 06:37:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 06:37:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 06:37:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-10 06:37:41,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 83 [2022-01-10 06:37:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:41,425 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-10 06:37:41,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-10 06:37:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:37:41,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:41,430 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:41,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:41,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:41,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash 694906923, now seen corresponding path program 4 times [2022-01-10 06:37:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926948694] [2022-01-10 06:37:41,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:41,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:41,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:37:41,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:41,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:37:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 06:37:41,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-01-10 06:37:42,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926948694] [2022-01-10 06:37:42,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926948694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:42,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2022-01-10 06:37:42,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500875683] [2022-01-10 06:37:42,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:42,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:37:42,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:37:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:37:42,439 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:42,587 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-01-10 06:37:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:37:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 87 [2022-01-10 06:37:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:42,591 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:42,591 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:42,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:42,592 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:42,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-10 06:37:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-10 06:37:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-10 06:37:42,604 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 87 [2022-01-10 06:37:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-10 06:37:42,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-10 06:37:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:37:42,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:42,607 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:42,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1826158945, now seen corresponding path program 5 times [2022-01-10 06:37:42,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188324872] [2022-01-10 06:37:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:42,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:42,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:37:42,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-10 06:37:42,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:42,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:37:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 318 proven. 265 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-10 06:37:43,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 321 proven. 309 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2022-01-10 06:37:45,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:45,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188324872] [2022-01-10 06:37:45,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188324872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:45,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:45,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 23 [2022-01-10 06:37:45,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038296612] [2022-01-10 06:37:45,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:37:45,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:37:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:45,172 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:45,591 INFO L93 Difference]: Finished difference Result 99 states and 164 transitions. [2022-01-10 06:37:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:37:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 137 [2022-01-10 06:37:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:45,592 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:37:45,592 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:37:45,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 242 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:37:45,593 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:45,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 141 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:37:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-01-10 06:37:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (29), 13 states have call predecessors, (29), 10 states have call successors, (29) [2022-01-10 06:37:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2022-01-10 06:37:45,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 137 [2022-01-10 06:37:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2022-01-10 06:37:45,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2022-01-10 06:37:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:37:45,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:45,601 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:45,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 06:37:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:45,807 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash -999938399, now seen corresponding path program 6 times [2022-01-10 06:37:45,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766290694] [2022-01-10 06:37:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:45,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:45,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:45,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:45,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:37:45,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 06:37:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 212 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-01-10 06:37:46,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 238 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-01-10 06:37:46,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:46,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766290694] [2022-01-10 06:37:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766290694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:46,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:46,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:46,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166583522] [2022-01-10 06:37:46,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:46,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:46,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:46,611 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:46,808 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-10 06:37:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:37:46,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) Word has length 99 [2022-01-10 06:37:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:46,809 INFO L225 Difference]: With dead ends: 56 [2022-01-10 06:37:46,809 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 06:37:46,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:46,810 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:46,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 126 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 06:37:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 06:37:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-01-10 06:37:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-01-10 06:37:46,818 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 99 [2022-01-10 06:37:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:46,819 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-01-10 06:37:46,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-01-10 06:37:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:37:46,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:46,820 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:46,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 06:37:47,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:47,042 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:47,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1213908091, now seen corresponding path program 7 times [2022-01-10 06:37:47,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:47,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36956508] [2022-01-10 06:37:47,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:47,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:47,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:47,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:47,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:37:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:37:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2022-01-10 06:37:47,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2022-01-10 06:37:48,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:48,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36956508] [2022-01-10 06:37:48,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36956508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:48,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:48,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2022-01-10 06:37:48,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916688569] [2022-01-10 06:37:48,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:48,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:37:48,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:37:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:48,077 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:48,321 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-01-10 06:37:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:37:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 162 [2022-01-10 06:37:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:48,325 INFO L225 Difference]: With dead ends: 120 [2022-01-10 06:37:48,325 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 06:37:48,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:48,326 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:48,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 06:37:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-01-10 06:37:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (33), 15 states have call predecessors, (33), 12 states have call successors, (33) [2022-01-10 06:37:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2022-01-10 06:37:48,337 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 162 [2022-01-10 06:37:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:48,337 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2022-01-10 06:37:48,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2022-01-10 06:37:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:37:48,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:48,339 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:48,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:37:48,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:48,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -812944297, now seen corresponding path program 8 times [2022-01-10 06:37:48,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796920514] [2022-01-10 06:37:48,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:48,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:48,552 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:48,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:37:48,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:37:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1042 refuted. 0 times theorem prover too weak. 3158 trivial. 0 not checked. [2022-01-10 06:37:48,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1099 refuted. 0 times theorem prover too weak. 3101 trivial. 0 not checked. [2022-01-10 06:37:50,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796920514] [2022-01-10 06:37:50,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796920514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:50,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:50,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2022-01-10 06:37:50,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142988490] [2022-01-10 06:37:50,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:50,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:37:50,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:37:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:37:50,051 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:50,384 INFO L93 Difference]: Finished difference Result 137 states and 257 transitions. [2022-01-10 06:37:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:37:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 263 [2022-01-10 06:37:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:50,385 INFO L225 Difference]: With dead ends: 137 [2022-01-10 06:37:50,385 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 06:37:50,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:37:50,386 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 68 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:50,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 201 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 06:37:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-01-10 06:37:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (34), 16 states have call predecessors, (34), 14 states have call successors, (34) [2022-01-10 06:37:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-10 06:37:50,391 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 263 [2022-01-10 06:37:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:50,391 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-10 06:37:50,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-10 06:37:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-10 06:37:50,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:50,411 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:50,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:50,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:50,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1895432243, now seen corresponding path program 9 times [2022-01-10 06:37:50,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67213189] [2022-01-10 06:37:50,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:50,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:50,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:50,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:50,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:37:50,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-10 06:37:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 242 refuted. 0 times theorem prover too weak. 10307 trivial. 0 not checked. [2022-01-10 06:37:51,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 271 refuted. 0 times theorem prover too weak. 10278 trivial. 0 not checked. [2022-01-10 06:37:52,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67213189] [2022-01-10 06:37:52,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67213189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:52,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:52,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:52,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676286710] [2022-01-10 06:37:52,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:52,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:52,648 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:52,769 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2022-01-10 06:37:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) Word has length 427 [2022-01-10 06:37:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:52,771 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:52,771 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 06:37:52,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:52,772 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:52,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 06:37:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-10 06:37:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2022-01-10 06:37:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-01-10 06:37:52,779 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 427 [2022-01-10 06:37:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:52,780 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-01-10 06:37:52,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-01-10 06:37:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-01-10 06:37:52,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:52,785 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:52,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:52,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:52,986 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash 279703193, now seen corresponding path program 10 times [2022-01-10 06:37:52,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79033688] [2022-01-10 06:37:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:52,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:52,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:52,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:37:53,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:53,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:37:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2708 refuted. 0 times theorem prover too weak. 15199 trivial. 0 not checked. [2022-01-10 06:37:53,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2785 refuted. 0 times theorem prover too weak. 15122 trivial. 0 not checked. [2022-01-10 06:37:55,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:55,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79033688] [2022-01-10 06:37:55,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79033688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:55,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:55,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:37:55,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587627098] [2022-01-10 06:37:55,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:37:55,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:37:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:37:55,145 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:55,439 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2022-01-10 06:37:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:37:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 528 [2022-01-10 06:37:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:55,441 INFO L225 Difference]: With dead ends: 156 [2022-01-10 06:37:55,441 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 06:37:55,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1033 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:37:55,442 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:55,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 228 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 06:37:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2022-01-10 06:37:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 06:37:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-01-10 06:37:55,448 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 528 [2022-01-10 06:37:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:55,449 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-01-10 06:37:55,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-01-10 06:37:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-01-10 06:37:55,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:55,463 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:55,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:55,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:55,664 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1303971427, now seen corresponding path program 11 times [2022-01-10 06:37:55,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141954068] [2022-01-10 06:37:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:55,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:55,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:55,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:37:56,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2022-01-10 06:37:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:37:57,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 2804 proven. 1289 refuted. 0 times theorem prover too weak. 27572 trivial. 0 not checked. [2022-01-10 06:37:57,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 2788 proven. 1358 refuted. 0 times theorem prover too weak. 27519 trivial. 0 not checked. [2022-01-10 06:38:01,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:01,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141954068] [2022-01-10 06:38:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141954068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:01,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:01,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 25 [2022-01-10 06:38:01,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913269904] [2022-01-10 06:38:01,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:01,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:38:01,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:38:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:01,481 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 06:38:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:03,022 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2022-01-10 06:38:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:38:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) Word has length 692 [2022-01-10 06:38:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:03,024 INFO L225 Difference]: With dead ends: 121 [2022-01-10 06:38:03,025 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 06:38:03,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1352 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:38:03,025 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:03,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 208 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:38:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 06:38:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2022-01-10 06:38:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 8 states have call predecessors, (15), 13 states have return successors, (37), 20 states have call predecessors, (37), 15 states have call successors, (37) [2022-01-10 06:38:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2022-01-10 06:38:03,035 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 692 [2022-01-10 06:38:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2022-01-10 06:38:03,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 25 states have internal predecessors, (58), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 06:38:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2022-01-10 06:38:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-01-10 06:38:03,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:03,047 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:03,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:03,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:03,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash 997121709, now seen corresponding path program 12 times [2022-01-10 06:38:03,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274397978] [2022-01-10 06:38:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:03,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:03,286 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:03,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:38:03,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-10 06:38:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4255 refuted. 0 times theorem prover too weak. 43485 trivial. 0 not checked. [2022-01-10 06:38:04,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4332 refuted. 0 times theorem prover too weak. 43408 trivial. 0 not checked. [2022-01-10 06:38:07,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274397978] [2022-01-10 06:38:07,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274397978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:07,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:07,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:38:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294597310] [2022-01-10 06:38:07,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:07,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:38:07,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:38:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:07,411 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:07,792 INFO L93 Difference]: Finished difference Result 230 states and 414 transitions. [2022-01-10 06:38:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:38:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 856 [2022-01-10 06:38:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:07,794 INFO L225 Difference]: With dead ends: 230 [2022-01-10 06:38:07,794 INFO L226 Difference]: Without dead ends: 136 [2022-01-10 06:38:07,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1690 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:38:07,796 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:07,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-10 06:38:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 99. [2022-01-10 06:38:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 18 states have call successors, (18), 10 states have call predecessors, (18), 16 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-01-10 06:38:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2022-01-10 06:38:07,803 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 856 [2022-01-10 06:38:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2022-01-10 06:38:07,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2022-01-10 06:38:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1122 [2022-01-10 06:38:07,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:07,811 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:07,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:38:08,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,024 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -776657203, now seen corresponding path program 13 times [2022-01-10 06:38:08,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:08,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744806368] [2022-01-10 06:38:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:08,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:08,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:08,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:38:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:38:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7568 refuted. 0 times theorem prover too weak. 75306 trivial. 0 not checked. [2022-01-10 06:38:09,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7694 refuted. 0 times theorem prover too weak. 75180 trivial. 0 not checked. [2022-01-10 06:38:12,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744806368] [2022-01-10 06:38:12,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744806368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:12,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:12,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2022-01-10 06:38:12,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557931853] [2022-01-10 06:38:12,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:12,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:38:12,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:38:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:12,494 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:13,042 INFO L93 Difference]: Finished difference Result 233 states and 463 transitions. [2022-01-10 06:38:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1121 [2022-01-10 06:38:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:13,044 INFO L225 Difference]: With dead ends: 233 [2022-01-10 06:38:13,044 INFO L226 Difference]: Without dead ends: 137 [2022-01-10 06:38:13,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2214 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:38:13,046 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:13,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 307 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-10 06:38:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2022-01-10 06:38:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (45), 24 states have call predecessors, (45), 19 states have call successors, (45) [2022-01-10 06:38:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2022-01-10 06:38:13,054 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 1121 [2022-01-10 06:38:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:13,055 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2022-01-10 06:38:13,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2022-01-10 06:38:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2245 [2022-01-10 06:38:13,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:13,084 INFO L514 BasicCegarLoop]: trace histogram [355, 355, 287, 177, 177, 177, 177, 177, 177, 110, 68, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:13,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:13,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:13,299 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1026576851, now seen corresponding path program 14 times [2022-01-10 06:38:13,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:13,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409900457] [2022-01-10 06:38:13,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:13,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:13,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:13,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:38:13,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:13,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:38:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17597 refuted. 0 times theorem prover too weak. 319511 trivial. 0 not checked. [2022-01-10 06:38:16,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17752 refuted. 0 times theorem prover too weak. 319356 trivial. 0 not checked. [2022-01-10 06:38:21,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409900457] [2022-01-10 06:38:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409900457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:21,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:21,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2022-01-10 06:38:21,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72400782] [2022-01-10 06:38:21,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:21,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:38:21,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:38:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:21,772 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:22,534 INFO L93 Difference]: Finished difference Result 230 states and 455 transitions. [2022-01-10 06:38:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:38:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2244 [2022-01-10 06:38:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:22,537 INFO L225 Difference]: With dead ends: 230 [2022-01-10 06:38:22,537 INFO L226 Difference]: Without dead ends: 136 [2022-01-10 06:38:22,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4497 GetRequests, 4456 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:38:22,538 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 168 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:22,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 372 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:38:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-10 06:38:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2022-01-10 06:38:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 21 states have call successors, (21), 11 states have call predecessors, (21), 16 states have return successors, (49), 26 states have call predecessors, (49), 21 states have call successors, (49) [2022-01-10 06:38:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-01-10 06:38:22,548 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 2244 [2022-01-10 06:38:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-01-10 06:38:22,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-01-10 06:38:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3633 [2022-01-10 06:38:22,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:22,618 INFO L514 BasicCegarLoop]: trace histogram [575, 575, 465, 287, 287, 287, 287, 287, 287, 178, 110, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:22,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:38:22,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:22,843 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1985919741, now seen corresponding path program 15 times [2022-01-10 06:38:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311853713] [2022-01-10 06:38:22,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:22,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:22,847 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:22,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:38:23,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-01-10 06:38:23,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:38:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 891103 backedges. 3366 proven. 31688 refuted. 0 times theorem prover too weak. 856049 trivial. 0 not checked. [2022-01-10 06:38:26,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 891103 backedges. 3366 proven. 31875 refuted. 0 times theorem prover too weak. 855862 trivial. 0 not checked. [2022-01-10 06:38:34,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311853713] [2022-01-10 06:38:34,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311853713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:34,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:34,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2022-01-10 06:38:34,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824490776] [2022-01-10 06:38:34,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:34,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:38:34,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:38:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:38:34,880 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2022-01-10 06:38:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:35,392 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2022-01-10 06:38:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 06:38:35,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 3632 [2022-01-10 06:38:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:35,394 INFO L225 Difference]: With dead ends: 250 [2022-01-10 06:38:35,395 INFO L226 Difference]: Without dead ends: 148 [2022-01-10 06:38:35,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7274 GetRequests, 7232 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:38:35,396 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:35,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 426 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-10 06:38:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2022-01-10 06:38:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 23 states have call successors, (23), 12 states have call predecessors, (23), 17 states have return successors, (53), 28 states have call predecessors, (53), 23 states have call successors, (53) [2022-01-10 06:38:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2022-01-10 06:38:35,404 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 3632 [2022-01-10 06:38:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:35,405 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2022-01-10 06:38:35,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2022-01-10 06:38:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2022-01-10 06:38:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5879 [2022-01-10 06:38:35,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:35,695 INFO L514 BasicCegarLoop]: trace histogram [931, 931, 753, 465, 465, 465, 465, 465, 465, 288, 178, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:35,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:38:35,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:35,904 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 234586629, now seen corresponding path program 16 times [2022-01-10 06:38:35,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:35,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879144630] [2022-01-10 06:38:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:35,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:35,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:35,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:35,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:38:37,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 8219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:38:38,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2338428 backedges. 5601 proven. 56417 refuted. 0 times theorem prover too weak. 2276410 trivial. 0 not checked. [2022-01-10 06:38:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates...