/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:51:46,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:51:46,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:51:46,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:51:46,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:51:46,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:51:46,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:51:46,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:51:46,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:51:46,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:51:46,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:51:46,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-10 06:51:46,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:51:46,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:51:46,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:51:46,144 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 06:51:46,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:51:46,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:51:46,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:51:46,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:51:46,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:51:46,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:51:46,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:51:46,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:51:46,168 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:51:46,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:51:46,169 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:51:46,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:51:46,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:51:46,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:51:46,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:51:46,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:51:46,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:51:46,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:46,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:51:46,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:51:46,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:51:46,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:51:46,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:51:46,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:51:46,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:51:46,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:51:46,436 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:51:46,436 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:51:46,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2022-01-10 06:51:46,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae2d4f861/e84a044f71504824862b6f091b75b927/FLAG81e589e14 [2022-01-10 06:51:46,938 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:51:46,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2022-01-10 06:51:46,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae2d4f861/e84a044f71504824862b6f091b75b927/FLAG81e589e14 [2022-01-10 06:51:47,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae2d4f861/e84a044f71504824862b6f091b75b927 [2022-01-10 06:51:47,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:51:47,302 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:51:47,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:47,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:51:47,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:51:47,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d9812b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47, skipping insertion in model container [2022-01-10 06:51:47,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:51:47,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:51:47,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2022-01-10 06:51:47,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:47,613 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:51:47,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2022-01-10 06:51:47,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:47,693 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:51:47,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47 WrapperNode [2022-01-10 06:51:47,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:47,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:47,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:51:47,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:51:47,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,764 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 259 [2022-01-10 06:51:47,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:47,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:51:47,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:51:47,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:51:47,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:51:47,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:51:47,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:51:47,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:51:47,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (1/1) ... [2022-01-10 06:51:47,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:51:47,856 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 06:51:47,884 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 06:51:47,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:51:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:51:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:51:47,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:51:48,016 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:51:48,018 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:51:48,387 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:51:48,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:51:48,393 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:51:48,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:48 BoogieIcfgContainer [2022-01-10 06:51:48,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:51:48,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:51:48,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:51:48,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:51:48,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:51:47" (1/3) ... [2022-01-10 06:51:48,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d015435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:48, skipping insertion in model container [2022-01-10 06:51:48,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:47" (2/3) ... [2022-01-10 06:51:48,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d015435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:48, skipping insertion in model container [2022-01-10 06:51:48,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:48" (3/3) ... [2022-01-10 06:51:48,402 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2022-01-10 06:51:48,406 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:51:48,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:51:48,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:51:48,450 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 06:51:48,450 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:51:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 06:51:48,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:48,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:48,470 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2022-01-10 06:51:48,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:48,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078732357] [2022-01-10 06:51:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:48,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:48,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:48,489 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 06:51:48,494 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 06:51:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:51:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:48,651 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 06:51:48,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:48,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078732357] [2022-01-10 06:51:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078732357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:48,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:48,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:51:48,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457336008] [2022-01-10 06:51:48,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:51:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:51:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:48,684 INFO L87 Difference]: Start difference. First operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:48,703 INFO L93 Difference]: Finished difference Result 126 states and 204 transitions. [2022-01-10 06:51:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:51:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 06:51:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:48,713 INFO L225 Difference]: With dead ends: 126 [2022-01-10 06:51:48,713 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 06:51:48,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:48,718 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:48,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 06:51:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-10 06:51:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-01-10 06:51:48,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2022-01-10 06:51:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:48,757 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-01-10 06:51:48,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-01-10 06:51:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 06:51:48,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:48,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:48,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:48,963 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 06:51:48,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2022-01-10 06:51:48,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812725045] [2022-01-10 06:51:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:48,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:48,967 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 06:51:48,969 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 06:51:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:49,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:49,184 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 06:51:49,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:49,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812725045] [2022-01-10 06:51:49,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812725045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:49,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:49,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:49,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375899050] [2022-01-10 06:51:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:49,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:49,203 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:49,308 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2022-01-10 06:51:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:51:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 06:51:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:49,318 INFO L225 Difference]: With dead ends: 165 [2022-01-10 06:51:49,318 INFO L226 Difference]: Without dead ends: 117 [2022-01-10 06:51:49,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:49,319 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:49,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 440 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-10 06:51:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2022-01-10 06:51:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2022-01-10 06:51:49,329 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2022-01-10 06:51:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2022-01-10 06:51:49,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2022-01-10 06:51:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 06:51:49,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:49,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:49,339 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 06:51:49,536 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 06:51:49,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2022-01-10 06:51:49,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:49,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078552458] [2022-01-10 06:51:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:49,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:49,539 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 06:51:49,541 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 06:51:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:49,772 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 06:51:49,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:49,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078552458] [2022-01-10 06:51:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078552458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:49,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:49,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:49,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915412485] [2022-01-10 06:51:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:49,780 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:49,816 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2022-01-10 06:51:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 06:51:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:49,820 INFO L225 Difference]: With dead ends: 155 [2022-01-10 06:51:49,820 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 06:51:49,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:49,822 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:49,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 220 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 06:51:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-01-10 06:51:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 108 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2022-01-10 06:51:49,832 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2022-01-10 06:51:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:49,833 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2022-01-10 06:51:49,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2022-01-10 06:51:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 06:51:49,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:49,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:49,847 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 06:51:50,045 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 06:51:50,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2022-01-10 06:51:50,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:50,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913181543] [2022-01-10 06:51:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:50,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:50,048 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 06:51:50,050 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 06:51:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:50,224 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 06:51:50,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:50,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913181543] [2022-01-10 06:51:50,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913181543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:50,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:50,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:50,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529002685] [2022-01-10 06:51:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:50,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:50,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:50,227 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:50,241 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2022-01-10 06:51:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 06:51:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:50,243 INFO L225 Difference]: With dead ends: 257 [2022-01-10 06:51:50,244 INFO L226 Difference]: Without dead ends: 177 [2022-01-10 06:51:50,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:50,245 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 55 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:50,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-10 06:51:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-01-10 06:51:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-01-10 06:51:50,257 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2022-01-10 06:51:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-01-10 06:51:50,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-01-10 06:51:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 06:51:50,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:50,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:50,274 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 06:51:50,467 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 06:51:50,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2022-01-10 06:51:50,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:50,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241416308] [2022-01-10 06:51:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:50,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:50,471 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 06:51:50,473 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 06:51:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:50,626 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 06:51:50,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:50,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241416308] [2022-01-10 06:51:50,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241416308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:50,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:50,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732513578] [2022-01-10 06:51:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:50,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:50,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:50,638 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:50,658 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2022-01-10 06:51:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 06:51:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:50,663 INFO L225 Difference]: With dead ends: 443 [2022-01-10 06:51:50,663 INFO L226 Difference]: Without dead ends: 297 [2022-01-10 06:51:50,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:50,669 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:50,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-10 06:51:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-01-10 06:51:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5034013605442176) internal successors, (442), 294 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2022-01-10 06:51:50,699 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2022-01-10 06:51:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:50,700 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2022-01-10 06:51:50,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2022-01-10 06:51:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 06:51:50,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:50,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:50,716 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 06:51:50,902 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 06:51:50,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2022-01-10 06:51:50,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:50,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356121407] [2022-01-10 06:51:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:50,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:50,905 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 06:51:50,906 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 06:51:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:50,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:51,096 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 06:51:51,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:51,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:51,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356121407] [2022-01-10 06:51:51,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356121407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:51,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:51,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:51,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528245403] [2022-01-10 06:51:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:51,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:51,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:51,099 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:51,122 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2022-01-10 06:51:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:51,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 06:51:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:51,126 INFO L225 Difference]: With dead ends: 779 [2022-01-10 06:51:51,126 INFO L226 Difference]: Without dead ends: 513 [2022-01-10 06:51:51,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:51,131 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:51,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-10 06:51:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2022-01-10 06:51:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.5019607843137255) internal successors, (766), 510 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2022-01-10 06:51:51,154 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2022-01-10 06:51:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2022-01-10 06:51:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2022-01-10 06:51:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 06:51:51,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:51,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:51,176 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 06:51:51,368 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 06:51:51,369 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2022-01-10 06:51:51,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:51,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111219325] [2022-01-10 06:51:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:51,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:51,371 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 06:51:51,373 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 06:51:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:51,937 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 06:51:51,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:51,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:51,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111219325] [2022-01-10 06:51:51,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111219325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:51,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:51,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:51:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948188545] [2022-01-10 06:51:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:51,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:51,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:51,940 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:52,106 INFO L93 Difference]: Finished difference Result 2921 states and 4451 transitions. [2022-01-10 06:51:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:51:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 06:51:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:52,117 INFO L225 Difference]: With dead ends: 2921 [2022-01-10 06:51:52,117 INFO L226 Difference]: Without dead ends: 2439 [2022-01-10 06:51:52,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:52,119 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 640 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:52,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 345 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-01-10 06:51:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1471. [2022-01-10 06:51:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 1.489795918367347) internal successors, (2190), 1470 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2190 transitions. [2022-01-10 06:51:52,182 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2190 transitions. Word has length 51 [2022-01-10 06:51:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 2190 transitions. [2022-01-10 06:51:52,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2190 transitions. [2022-01-10 06:51:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 06:51:52,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:52,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:52,198 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 06:51:52,393 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 06:51:52,394 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2022-01-10 06:51:52,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:52,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216265144] [2022-01-10 06:51:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:52,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:52,396 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 06:51:52,397 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 06:51:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:52,570 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 06:51:52,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:52,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216265144] [2022-01-10 06:51:52,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216265144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:52,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:52,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:52,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105377708] [2022-01-10 06:51:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:52,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:52,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:52,572 INFO L87 Difference]: Start difference. First operand 1471 states and 2190 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:52,645 INFO L93 Difference]: Finished difference Result 3581 states and 5342 transitions. [2022-01-10 06:51:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-10 06:51:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:52,655 INFO L225 Difference]: With dead ends: 3581 [2022-01-10 06:51:52,655 INFO L226 Difference]: Without dead ends: 2139 [2022-01-10 06:51:52,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:52,658 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 39 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:52,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 185 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-01-10 06:51:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2137. [2022-01-10 06:51:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 1.4700374531835205) internal successors, (3140), 2136 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3140 transitions. [2022-01-10 06:51:52,733 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3140 transitions. Word has length 53 [2022-01-10 06:51:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:52,734 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 3140 transitions. [2022-01-10 06:51:52,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3140 transitions. [2022-01-10 06:51:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 06:51:52,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:52,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:52,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 06:51:52,944 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 06:51:52,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2022-01-10 06:51:52,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:52,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577620169] [2022-01-10 06:51:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:52,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:52,947 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 06:51:52,949 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 06:51:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:53,096 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 06:51:53,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:53,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577620169] [2022-01-10 06:51:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577620169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:53,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702813909] [2022-01-10 06:51:53,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:53,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:53,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:53,099 INFO L87 Difference]: Start difference. First operand 2137 states and 3140 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:53,244 INFO L93 Difference]: Finished difference Result 4097 states and 5931 transitions. [2022-01-10 06:51:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-10 06:51:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:53,261 INFO L225 Difference]: With dead ends: 4097 [2022-01-10 06:51:53,261 INFO L226 Difference]: Without dead ends: 4095 [2022-01-10 06:51:53,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:51:53,263 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 178 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:53,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 407 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-01-10 06:51:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2305. [2022-01-10 06:51:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.4322916666666667) internal successors, (3300), 2304 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3300 transitions. [2022-01-10 06:51:53,396 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3300 transitions. Word has length 54 [2022-01-10 06:51:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:53,396 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3300 transitions. [2022-01-10 06:51:53,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3300 transitions. [2022-01-10 06:51:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:53,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:53,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:53,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:53,608 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 06:51:53,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2022-01-10 06:51:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46951788] [2022-01-10 06:51:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:53,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:53,610 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 06:51:53,613 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 06:51:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:53,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:54,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46951788] [2022-01-10 06:51:54,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46951788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:54,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:54,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:54,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247589650] [2022-01-10 06:51:54,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:54,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:54,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:54,923 INFO L87 Difference]: Start difference. First operand 2305 states and 3300 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:55,107 INFO L93 Difference]: Finished difference Result 3918 states and 5639 transitions. [2022-01-10 06:51:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:55,116 INFO L225 Difference]: With dead ends: 3918 [2022-01-10 06:51:55,116 INFO L226 Difference]: Without dead ends: 2332 [2022-01-10 06:51:55,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:55,119 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 106 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:55,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 571 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-01-10 06:51:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-01-10 06:51:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2331. [2022-01-10 06:51:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.4296137339055794) internal successors, (3331), 2330 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3331 transitions. [2022-01-10 06:51:55,219 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3331 transitions. Word has length 78 [2022-01-10 06:51:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:55,220 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 3331 transitions. [2022-01-10 06:51:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3331 transitions. [2022-01-10 06:51:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:55,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:55,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:55,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:55,431 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 06:51:55,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2022-01-10 06:51:55,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:55,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109944498] [2022-01-10 06:51:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:55,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:55,433 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 06:51:55,435 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 06:51:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:56,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109944498] [2022-01-10 06:51:56,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109944498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:56,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:56,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:56,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731271884] [2022-01-10 06:51:56,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:56,707 INFO L87 Difference]: Start difference. First operand 2331 states and 3331 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:56,903 INFO L93 Difference]: Finished difference Result 4002 states and 5730 transitions. [2022-01-10 06:51:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:51:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:56,912 INFO L225 Difference]: With dead ends: 4002 [2022-01-10 06:51:56,912 INFO L226 Difference]: Without dead ends: 2416 [2022-01-10 06:51:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:56,915 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 161 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:56,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 563 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-01-10 06:51:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-01-10 06:51:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2341. [2022-01-10 06:51:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 1.4294871794871795) internal successors, (3345), 2340 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3345 transitions. [2022-01-10 06:51:57,007 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3345 transitions. Word has length 78 [2022-01-10 06:51:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:57,007 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3345 transitions. [2022-01-10 06:51:57,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3345 transitions. [2022-01-10 06:51:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:57,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:57,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:57,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:57,218 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 06:51:57,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1993662735, now seen corresponding path program 1 times [2022-01-10 06:51:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879253228] [2022-01-10 06:51:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:57,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:57,221 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 06:51:57,222 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 06:51:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:57,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:57,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:57,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879253228] [2022-01-10 06:51:57,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879253228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:57,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239408434] [2022-01-10 06:51:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:57,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:57,403 INFO L87 Difference]: Start difference. First operand 2341 states and 3345 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:57,492 INFO L93 Difference]: Finished difference Result 4617 states and 6615 transitions. [2022-01-10 06:51:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:57,500 INFO L225 Difference]: With dead ends: 4617 [2022-01-10 06:51:57,501 INFO L226 Difference]: Without dead ends: 2343 [2022-01-10 06:51:57,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:57,504 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 40 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:57,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 212 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-01-10 06:51:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2341. [2022-01-10 06:51:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 1.4132478632478633) internal successors, (3307), 2340 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3307 transitions. [2022-01-10 06:51:57,589 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3307 transitions. Word has length 78 [2022-01-10 06:51:57,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:57,590 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3307 transitions. [2022-01-10 06:51:57,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3307 transitions. [2022-01-10 06:51:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:57,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:57,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:57,605 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 06:51:57,801 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 06:51:57,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1119375889, now seen corresponding path program 1 times [2022-01-10 06:51:57,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755573730] [2022-01-10 06:51:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:57,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:57,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:57,803 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 06:51:57,805 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 06:51:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:57,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:57,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755573730] [2022-01-10 06:51:57,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755573730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:57,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:57,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:57,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048505422] [2022-01-10 06:51:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:57,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:57,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:57,993 INFO L87 Difference]: Start difference. First operand 2341 states and 3307 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:58,037 INFO L93 Difference]: Finished difference Result 3161 states and 4477 transitions. [2022-01-10 06:51:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:58,041 INFO L225 Difference]: With dead ends: 3161 [2022-01-10 06:51:58,041 INFO L226 Difference]: Without dead ends: 887 [2022-01-10 06:51:58,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:58,045 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 34 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:58,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 203 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-01-10 06:51:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 879. [2022-01-10 06:51:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3929384965831435) internal successors, (1223), 878 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1223 transitions. [2022-01-10 06:51:58,082 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1223 transitions. Word has length 78 [2022-01-10 06:51:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:58,083 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1223 transitions. [2022-01-10 06:51:58,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1223 transitions. [2022-01-10 06:51:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:58,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:58,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:58,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:51:58,292 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 06:51:58,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash 629218461, now seen corresponding path program 1 times [2022-01-10 06:51:58,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039200745] [2022-01-10 06:51:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:58,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:58,294 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 06:51:58,295 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 06:51:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:51:58,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:58,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039200745] [2022-01-10 06:51:58,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039200745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:58,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:58,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:58,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314616386] [2022-01-10 06:51:58,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:58,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:58,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:58,729 INFO L87 Difference]: Start difference. First operand 879 states and 1223 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:58,790 INFO L93 Difference]: Finished difference Result 1679 states and 2358 transitions. [2022-01-10 06:51:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:58,793 INFO L225 Difference]: With dead ends: 1679 [2022-01-10 06:51:58,793 INFO L226 Difference]: Without dead ends: 879 [2022-01-10 06:51:58,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:58,795 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 30 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:58,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 191 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-10 06:51:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-10 06:51:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-01-10 06:51:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3917995444191344) internal successors, (1222), 878 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1222 transitions. [2022-01-10 06:51:58,838 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1222 transitions. Word has length 78 [2022-01-10 06:51:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:58,838 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1222 transitions. [2022-01-10 06:51:58,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1222 transitions. [2022-01-10 06:51:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:58,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:58,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:58,854 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 06:51:59,053 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 06:51:59,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash -372143203, now seen corresponding path program 1 times [2022-01-10 06:51:59,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7476452] [2022-01-10 06:51:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:59,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:59,056 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 06:51:59,057 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 06:51:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:59,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:59,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:59,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7476452] [2022-01-10 06:51:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7476452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:59,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:59,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:59,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379501078] [2022-01-10 06:51:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:59,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:59,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:59,453 INFO L87 Difference]: Start difference. First operand 879 states and 1222 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:59,511 INFO L93 Difference]: Finished difference Result 1683 states and 2362 transitions. [2022-01-10 06:51:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:51:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:59,517 INFO L225 Difference]: With dead ends: 1683 [2022-01-10 06:51:59,517 INFO L226 Difference]: Without dead ends: 879 [2022-01-10 06:51:59,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:59,521 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:59,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 260 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-01-10 06:51:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-10 06:51:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-01-10 06:51:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3906605922551254) internal successors, (1221), 878 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1221 transitions. [2022-01-10 06:51:59,552 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1221 transitions. Word has length 78 [2022-01-10 06:51:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1221 transitions. [2022-01-10 06:51:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1221 transitions. [2022-01-10 06:51:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:51:59,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:59,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:59,565 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 06:51:59,763 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 06:51:59,763 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 575830685, now seen corresponding path program 1 times [2022-01-10 06:51:59,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447879223] [2022-01-10 06:51:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:59,765 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 06:51:59,766 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 06:51:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:59,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:52:00,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:00,151 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447879223] [2022-01-10 06:52:00,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447879223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:00,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:00,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:00,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827679021] [2022-01-10 06:52:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:00,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:00,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:00,152 INFO L87 Difference]: Start difference. First operand 879 states and 1221 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:00,218 INFO L93 Difference]: Finished difference Result 1687 states and 2366 transitions. [2022-01-10 06:52:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:52:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:00,221 INFO L225 Difference]: With dead ends: 1687 [2022-01-10 06:52:00,221 INFO L226 Difference]: Without dead ends: 879 [2022-01-10 06:52:00,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:00,223 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 26 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:00,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 209 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-01-10 06:52:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-10 06:52:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-01-10 06:52:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3895216400911161) internal successors, (1220), 878 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1220 transitions. [2022-01-10 06:52:00,253 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1220 transitions. Word has length 78 [2022-01-10 06:52:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1220 transitions. [2022-01-10 06:52:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1220 transitions. [2022-01-10 06:52:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:52:00,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:00,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:00,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:00,463 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 06:52:00,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1120135581, now seen corresponding path program 1 times [2022-01-10 06:52:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:00,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253018248] [2022-01-10 06:52:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:00,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:00,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:00,466 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 06:52:00,471 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 06:52:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:52:00,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:00,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:00,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253018248] [2022-01-10 06:52:00,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253018248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:00,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:00,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:00,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856501847] [2022-01-10 06:52:00,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:00,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:00,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:00,822 INFO L87 Difference]: Start difference. First operand 879 states and 1220 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:00,894 INFO L93 Difference]: Finished difference Result 1673 states and 2349 transitions. [2022-01-10 06:52:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 06:52:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:00,897 INFO L225 Difference]: With dead ends: 1673 [2022-01-10 06:52:00,898 INFO L226 Difference]: Without dead ends: 861 [2022-01-10 06:52:00,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:00,899 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 26 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:00,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 253 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-01-10 06:52:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-10 06:52:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-01-10 06:52:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.3930232558139535) internal successors, (1198), 860 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1198 transitions. [2022-01-10 06:52:00,928 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1198 transitions. Word has length 78 [2022-01-10 06:52:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:00,928 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1198 transitions. [2022-01-10 06:52:00,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1198 transitions. [2022-01-10 06:52:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:52:00,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:00,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:00,940 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 06:52:01,138 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 06:52:01,138 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -513037622, now seen corresponding path program 1 times [2022-01-10 06:52:01,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997831678] [2022-01-10 06:52:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:01,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:01,141 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 06:52:01,143 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 06:52:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:01,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:02,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997831678] [2022-01-10 06:52:02,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997831678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:02,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:02,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:02,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946899157] [2022-01-10 06:52:02,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:02,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:02,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:02,295 INFO L87 Difference]: Start difference. First operand 861 states and 1198 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:02,399 INFO L93 Difference]: Finished difference Result 1669 states and 2351 transitions. [2022-01-10 06:52:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:52:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 06:52:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:02,402 INFO L225 Difference]: With dead ends: 1669 [2022-01-10 06:52:02,402 INFO L226 Difference]: Without dead ends: 875 [2022-01-10 06:52:02,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:02,404 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 114 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:02,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 561 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 06:52:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-10 06:52:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2022-01-10 06:52:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.3944954128440368) internal successors, (1216), 872 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1216 transitions. [2022-01-10 06:52:02,434 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1216 transitions. Word has length 79 [2022-01-10 06:52:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:02,434 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1216 transitions. [2022-01-10 06:52:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1216 transitions. [2022-01-10 06:52:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:52:02,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:02,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:02,644 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 06:52:02,645 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash -175244480, now seen corresponding path program 1 times [2022-01-10 06:52:02,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:02,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101577774] [2022-01-10 06:52:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:02,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:02,647 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 06:52:02,655 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 06:52:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:52:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:02,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:02,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:02,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101577774] [2022-01-10 06:52:02,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101577774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:02,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:02,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:52:02,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764776824] [2022-01-10 06:52:02,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:02,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:52:02,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:52:02,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:52:02,837 INFO L87 Difference]: Start difference. First operand 873 states and 1216 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:02,855 INFO L93 Difference]: Finished difference Result 1273 states and 1782 transitions. [2022-01-10 06:52:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:52:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 06:52:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:02,857 INFO L225 Difference]: With dead ends: 1273 [2022-01-10 06:52:02,857 INFO L226 Difference]: Without dead ends: 479 [2022-01-10 06:52:02,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:52:02,858 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:02,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 186 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:52:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-10 06:52:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-01-10 06:52:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.3529411764705883) internal successors, (644), 476 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 644 transitions. [2022-01-10 06:52:02,875 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 644 transitions. Word has length 79 [2022-01-10 06:52:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:02,876 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 644 transitions. [2022-01-10 06:52:02,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 644 transitions. [2022-01-10 06:52:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 06:52:02,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:02,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:02,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:03,086 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 06:52:03,086 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -45372398, now seen corresponding path program 1 times [2022-01-10 06:52:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440095817] [2022-01-10 06:52:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:03,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:03,088 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 06:52:03,088 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 06:52:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:03,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:04,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:04,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440095817] [2022-01-10 06:52:04,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440095817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:04,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:04,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:04,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323562716] [2022-01-10 06:52:04,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:04,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:04,293 INFO L87 Difference]: Start difference. First operand 477 states and 644 transitions. Second operand has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:04,377 INFO L93 Difference]: Finished difference Result 889 states and 1227 transitions. [2022-01-10 06:52:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:52:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 06:52:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:04,379 INFO L225 Difference]: With dead ends: 889 [2022-01-10 06:52:04,379 INFO L226 Difference]: Without dead ends: 491 [2022-01-10 06:52:04,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:52:04,381 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 63 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:04,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 724 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-01-10 06:52:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-10 06:52:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2022-01-10 06:52:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.3565573770491803) internal successors, (662), 488 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 662 transitions. [2022-01-10 06:52:04,398 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 662 transitions. Word has length 80 [2022-01-10 06:52:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:04,399 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 662 transitions. [2022-01-10 06:52:04,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 15 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 662 transitions. [2022-01-10 06:52:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 06:52:04,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:04,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:04,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:04,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:04,609 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1172613000, now seen corresponding path program 1 times [2022-01-10 06:52:04,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:04,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583468914] [2022-01-10 06:52:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:04,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:04,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:04,611 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:04,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:52:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:52:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:04,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:04,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583468914] [2022-01-10 06:52:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583468914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:04,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:04,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:52:04,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950898312] [2022-01-10 06:52:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:04,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:52:04,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:52:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:52:04,763 INFO L87 Difference]: Start difference. First operand 489 states and 662 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:04,781 INFO L93 Difference]: Finished difference Result 691 states and 943 transitions. [2022-01-10 06:52:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:52:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 06:52:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:04,782 INFO L225 Difference]: With dead ends: 691 [2022-01-10 06:52:04,783 INFO L226 Difference]: Without dead ends: 293 [2022-01-10 06:52:04,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:52:04,784 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:04,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 170 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:52:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-10 06:52:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2022-01-10 06:52:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.303448275862069) internal successors, (378), 290 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 378 transitions. [2022-01-10 06:52:04,795 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 378 transitions. Word has length 80 [2022-01-10 06:52:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:04,795 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 378 transitions. [2022-01-10 06:52:04,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 378 transitions. [2022-01-10 06:52:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:52:04,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:04,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:04,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 06:52:04,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:04,999 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1105612801, now seen corresponding path program 1 times [2022-01-10 06:52:05,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:05,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335086784] [2022-01-10 06:52:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:05,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:05,002 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:05,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:52:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:52:05,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:05,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:05,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335086784] [2022-01-10 06:52:05,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335086784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:05,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:05,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:52:05,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049339540] [2022-01-10 06:52:05,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:05,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:05,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:05,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:05,501 INFO L87 Difference]: Start difference. First operand 291 states and 378 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:05,586 INFO L93 Difference]: Finished difference Result 645 states and 863 transitions. [2022-01-10 06:52:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:52:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 06:52:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:05,588 INFO L225 Difference]: With dead ends: 645 [2022-01-10 06:52:05,588 INFO L226 Difference]: Without dead ends: 445 [2022-01-10 06:52:05,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:05,590 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 299 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:05,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 439 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:52:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-10 06:52:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 291. [2022-01-10 06:52:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.282758620689655) internal successors, (372), 290 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2022-01-10 06:52:05,605 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 81 [2022-01-10 06:52:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:05,605 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2022-01-10 06:52:05,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2022-01-10 06:52:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:52:05,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:05,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:05,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:05,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:05,814 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1686995388, now seen corresponding path program 1 times [2022-01-10 06:52:05,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:05,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557061431] [2022-01-10 06:52:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:05,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:05,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:05,817 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:05,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:52:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:52:06,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:06,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:06,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557061431] [2022-01-10 06:52:06,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557061431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:06,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:06,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:52:06,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987381591] [2022-01-10 06:52:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:06,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:06,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:06,447 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:06,539 INFO L93 Difference]: Finished difference Result 579 states and 769 transitions. [2022-01-10 06:52:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:52:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 06:52:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:06,543 INFO L225 Difference]: With dead ends: 579 [2022-01-10 06:52:06,543 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 06:52:06,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:06,547 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 299 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:06,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 446 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:52:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 06:52:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 361. [2022-01-10 06:52:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.288888888888889) internal successors, (464), 360 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 464 transitions. [2022-01-10 06:52:06,565 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 464 transitions. Word has length 81 [2022-01-10 06:52:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:06,565 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 464 transitions. [2022-01-10 06:52:06,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 464 transitions. [2022-01-10 06:52:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:52:06,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:06,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:06,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:06,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1252508129, now seen corresponding path program 1 times [2022-01-10 06:52:06,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:06,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414624265] [2022-01-10 06:52:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:06,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:06,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:06,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:52:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:52:07,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:07,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414624265] [2022-01-10 06:52:07,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414624265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:07,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:07,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:52:07,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210911124] [2022-01-10 06:52:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:07,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:07,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:07,301 INFO L87 Difference]: Start difference. First operand 361 states and 464 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:07,370 INFO L93 Difference]: Finished difference Result 649 states and 861 transitions. [2022-01-10 06:52:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:52:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 06:52:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:07,372 INFO L225 Difference]: With dead ends: 649 [2022-01-10 06:52:07,372 INFO L226 Difference]: Without dead ends: 581 [2022-01-10 06:52:07,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:07,373 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 294 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:07,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 493 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:52:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-10 06:52:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 437. [2022-01-10 06:52:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.2935779816513762) internal successors, (564), 436 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 564 transitions. [2022-01-10 06:52:07,392 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 564 transitions. Word has length 81 [2022-01-10 06:52:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 564 transitions. [2022-01-10 06:52:07,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 564 transitions. [2022-01-10 06:52:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:52:07,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:07,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:07,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 06:52:07,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:07,595 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 892156004, now seen corresponding path program 1 times [2022-01-10 06:52:07,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733687100] [2022-01-10 06:52:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:07,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:07,597 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:52:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:52:08,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:08,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733687100] [2022-01-10 06:52:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733687100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:08,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:08,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:52:08,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422361884] [2022-01-10 06:52:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:08,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:08,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:08,171 INFO L87 Difference]: Start difference. First operand 437 states and 564 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:08,271 INFO L93 Difference]: Finished difference Result 725 states and 961 transitions. [2022-01-10 06:52:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:52:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 06:52:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:08,281 INFO L225 Difference]: With dead ends: 725 [2022-01-10 06:52:08,281 INFO L226 Difference]: Without dead ends: 657 [2022-01-10 06:52:08,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:08,282 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 291 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:08,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 469 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:52:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-10 06:52:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 513. [2022-01-10 06:52:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.296875) internal successors, (664), 512 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 664 transitions. [2022-01-10 06:52:08,305 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 664 transitions. Word has length 81 [2022-01-10 06:52:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:08,306 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 664 transitions. [2022-01-10 06:52:08,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 664 transitions. [2022-01-10 06:52:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:52:08,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:08,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:08,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:08,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:08,516 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2039370684, now seen corresponding path program 1 times [2022-01-10 06:52:08,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:08,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884017085] [2022-01-10 06:52:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:08,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:08,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:08,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:08,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:52:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 06:52:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:13,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884017085] [2022-01-10 06:52:13,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884017085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:13,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:13,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2022-01-10 06:52:13,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563016685] [2022-01-10 06:52:13,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:13,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-10 06:52:13,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-10 06:52:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:52:13,886 INFO L87 Difference]: Start difference. First operand 513 states and 664 transitions. Second operand has 49 states, 49 states have (on average 3.142857142857143) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:14,459 INFO L93 Difference]: Finished difference Result 826 states and 1067 transitions. [2022-01-10 06:52:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 06:52:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.142857142857143) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:52:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:14,461 INFO L225 Difference]: With dead ends: 826 [2022-01-10 06:52:14,462 INFO L226 Difference]: Without dead ends: 688 [2022-01-10 06:52:14,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 06:52:14,463 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 209 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:14,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1597 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 282 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-01-10 06:52:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-10 06:52:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 524. [2022-01-10 06:52:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.2944550669216062) internal successors, (677), 523 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 677 transitions. [2022-01-10 06:52:14,498 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 677 transitions. Word has length 82 [2022-01-10 06:52:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 677 transitions. [2022-01-10 06:52:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.142857142857143) internal successors, (154), 49 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 677 transitions. [2022-01-10 06:52:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:52:14,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:14,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:14,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 06:52:14,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:14,708 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1325300801, now seen corresponding path program 1 times [2022-01-10 06:52:14,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:14,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681492456] [2022-01-10 06:52:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:14,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:14,710 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:14,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:52:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:52:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:15,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:16,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681492456] [2022-01-10 06:52:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681492456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:16,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:16,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 06:52:16,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584833077] [2022-01-10 06:52:16,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:16,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:52:16,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:52:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:52:16,129 INFO L87 Difference]: Start difference. First operand 524 states and 677 transitions. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:16,206 INFO L93 Difference]: Finished difference Result 662 states and 864 transitions. [2022-01-10 06:52:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:52:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:52:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:16,207 INFO L225 Difference]: With dead ends: 662 [2022-01-10 06:52:16,208 INFO L226 Difference]: Without dead ends: 508 [2022-01-10 06:52:16,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:52:16,208 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 27 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:16,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 887 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-01-10 06:52:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-10 06:52:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2022-01-10 06:52:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.291913214990138) internal successors, (655), 507 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 655 transitions. [2022-01-10 06:52:16,232 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 655 transitions. Word has length 82 [2022-01-10 06:52:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:16,233 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 655 transitions. [2022-01-10 06:52:16,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 655 transitions. [2022-01-10 06:52:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:52:16,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:16,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:16,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:16,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:16,445 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 388685212, now seen corresponding path program 1 times [2022-01-10 06:52:16,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:16,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965168275] [2022-01-10 06:52:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:16,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:16,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:16,447 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:16,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:52:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:52:16,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:18,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:18,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965168275] [2022-01-10 06:52:18,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965168275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:18,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:18,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2022-01-10 06:52:18,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275197447] [2022-01-10 06:52:18,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:18,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 06:52:18,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 06:52:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-01-10 06:52:18,550 INFO L87 Difference]: Start difference. First operand 508 states and 655 transitions. Second operand has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:18,729 INFO L93 Difference]: Finished difference Result 806 states and 1040 transitions. [2022-01-10 06:52:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:52:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:52:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:18,730 INFO L225 Difference]: With dead ends: 806 [2022-01-10 06:52:18,730 INFO L226 Difference]: Without dead ends: 652 [2022-01-10 06:52:18,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:52:18,731 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 164 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:18,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1188 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-10 06:52:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-10 06:52:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 488. [2022-01-10 06:52:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.2956878850102669) internal successors, (631), 487 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 631 transitions. [2022-01-10 06:52:18,757 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 631 transitions. Word has length 82 [2022-01-10 06:52:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:18,757 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 631 transitions. [2022-01-10 06:52:18,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 631 transitions. [2022-01-10 06:52:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:52:18,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:18,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:18,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:18,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,966 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1847365168, now seen corresponding path program 1 times [2022-01-10 06:52:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551992446] [2022-01-10 06:52:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:18,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:18,968 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:18,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:52:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:52:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:52:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:52:19,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:19,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551992446] [2022-01-10 06:52:19,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551992446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:19,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:19,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:52:19,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521104498] [2022-01-10 06:52:19,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:19,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:19,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:19,420 INFO L87 Difference]: Start difference. First operand 488 states and 631 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:19,485 INFO L93 Difference]: Finished difference Result 1483 states and 1937 transitions. [2022-01-10 06:52:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:19,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:52:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:19,487 INFO L225 Difference]: With dead ends: 1483 [2022-01-10 06:52:19,487 INFO L226 Difference]: Without dead ends: 1085 [2022-01-10 06:52:19,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:19,488 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 195 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 421 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 06:52:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-10 06:52:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1011. [2022-01-10 06:52:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.2910891089108911) internal successors, (1304), 1010 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1304 transitions. [2022-01-10 06:52:19,527 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1304 transitions. Word has length 83 [2022-01-10 06:52:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:19,528 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1304 transitions. [2022-01-10 06:52:19,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1304 transitions. [2022-01-10 06:52:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:52:19,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:19,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:19,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 06:52:19,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:19,729 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 287774809, now seen corresponding path program 1 times [2022-01-10 06:52:19,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:19,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434089576] [2022-01-10 06:52:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:19,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:19,731 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:19,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:52:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 06:52:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:26,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:31,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:31,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434089576] [2022-01-10 06:52:31,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434089576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:31,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:31,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2022-01-10 06:52:31,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499873295] [2022-01-10 06:52:31,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:31,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 06:52:31,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 06:52:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 06:52:31,086 INFO L87 Difference]: Start difference. First operand 1011 states and 1304 transitions. Second operand has 47 states, 47 states have (on average 3.276595744680851) internal successors, (154), 47 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:32,165 INFO L93 Difference]: Finished difference Result 1319 states and 1703 transitions. [2022-01-10 06:52:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 06:52:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.276595744680851) internal successors, (154), 47 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:52:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:32,169 INFO L225 Difference]: With dead ends: 1319 [2022-01-10 06:52:32,169 INFO L226 Difference]: Without dead ends: 1047 [2022-01-10 06:52:32,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:52:32,171 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 218 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:32,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1190 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 408 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-01-10 06:52:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-01-10 06:52:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1017. [2022-01-10 06:52:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.2903543307086613) internal successors, (1311), 1016 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1311 transitions. [2022-01-10 06:52:32,218 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1311 transitions. Word has length 83 [2022-01-10 06:52:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:32,218 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1311 transitions. [2022-01-10 06:52:32,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.276595744680851) internal successors, (154), 47 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1311 transitions. [2022-01-10 06:52:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:52:32,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:32,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:32,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:32,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:32,420 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1122155396, now seen corresponding path program 1 times [2022-01-10 06:52:32,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198022614] [2022-01-10 06:52:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:32,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:32,422 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:32,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 06:52:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:52:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:34,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:35,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:35,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198022614] [2022-01-10 06:52:35,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198022614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:35,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:35,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 06:52:35,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082879741] [2022-01-10 06:52:35,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:35,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:52:35,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:52:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:52:35,101 INFO L87 Difference]: Start difference. First operand 1017 states and 1311 transitions. Second operand has 29 states, 29 states have (on average 5.241379310344827) internal successors, (152), 29 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:35,266 INFO L93 Difference]: Finished difference Result 1526 states and 1950 transitions. [2022-01-10 06:52:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:52:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.241379310344827) internal successors, (152), 29 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:52:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:35,269 INFO L225 Difference]: With dead ends: 1526 [2022-01-10 06:52:35,269 INFO L226 Difference]: Without dead ends: 1152 [2022-01-10 06:52:35,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:35,271 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 153 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:35,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1206 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 154 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-01-10 06:52:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-01-10 06:52:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 859. [2022-01-10 06:52:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.2855477855477855) internal successors, (1103), 858 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1103 transitions. [2022-01-10 06:52:35,318 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1103 transitions. Word has length 83 [2022-01-10 06:52:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:35,318 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1103 transitions. [2022-01-10 06:52:35,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.241379310344827) internal successors, (152), 29 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1103 transitions. [2022-01-10 06:52:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:52:35,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:35,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:35,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 06:52:35,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:35,527 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -556252178, now seen corresponding path program 1 times [2022-01-10 06:52:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485889998] [2022-01-10 06:52:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:35,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:35,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:35,529 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:35,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 06:52:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:52:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:52:35,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:52:35,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:35,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485889998] [2022-01-10 06:52:35,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485889998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:35,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:35,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:52:35,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106414510] [2022-01-10 06:52:35,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:35,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:35,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:35,952 INFO L87 Difference]: Start difference. First operand 859 states and 1103 transitions. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:36,006 INFO L93 Difference]: Finished difference Result 1675 states and 2162 transitions. [2022-01-10 06:52:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 06:52:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:36,008 INFO L225 Difference]: With dead ends: 1675 [2022-01-10 06:52:36,008 INFO L226 Difference]: Without dead ends: 1005 [2022-01-10 06:52:36,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:36,009 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 182 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:36,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 357 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-01-10 06:52:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-10 06:52:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 830. [2022-01-10 06:52:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.284680337756333) internal successors, (1065), 829 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1065 transitions. [2022-01-10 06:52:36,047 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1065 transitions. Word has length 84 [2022-01-10 06:52:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:36,047 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1065 transitions. [2022-01-10 06:52:36,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1065 transitions. [2022-01-10 06:52:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:52:36,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:36,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:36,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 06:52:36,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:36,248 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1040132846, now seen corresponding path program 1 times [2022-01-10 06:52:36,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:36,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257189607] [2022-01-10 06:52:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:36,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:36,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:36,250 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:36,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 06:52:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:52:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:37,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:37,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257189607] [2022-01-10 06:52:37,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257189607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:37,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:37,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 06:52:37,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070336697] [2022-01-10 06:52:37,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:37,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:52:37,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:52:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:52:37,537 INFO L87 Difference]: Start difference. First operand 830 states and 1065 transitions. Second operand has 17 states, 17 states have (on average 8.705882352941176) internal successors, (148), 17 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:37,626 INFO L93 Difference]: Finished difference Result 1035 states and 1336 transitions. [2022-01-10 06:52:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:52:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.705882352941176) internal successors, (148), 17 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 06:52:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:37,628 INFO L225 Difference]: With dead ends: 1035 [2022-01-10 06:52:37,628 INFO L226 Difference]: Without dead ends: 763 [2022-01-10 06:52:37,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:52:37,629 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 76 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:37,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 615 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-10 06:52:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-10 06:52:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 747. [2022-01-10 06:52:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.2801608579088473) internal successors, (955), 746 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 955 transitions. [2022-01-10 06:52:37,661 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 955 transitions. Word has length 84 [2022-01-10 06:52:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:37,661 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 955 transitions. [2022-01-10 06:52:37,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.705882352941176) internal successors, (148), 17 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 955 transitions. [2022-01-10 06:52:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:37,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:37,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:37,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 06:52:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:37,862 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash -923798007, now seen corresponding path program 1 times [2022-01-10 06:52:37,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722639637] [2022-01-10 06:52:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:37,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:37,864 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:37,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 06:52:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 47 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:39,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 47 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:39,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:39,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722639637] [2022-01-10 06:52:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722639637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:39,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:52:39,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422744829] [2022-01-10 06:52:39,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:39,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:52:39,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:52:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:52:39,917 INFO L87 Difference]: Start difference. First operand 747 states and 955 transitions. Second operand has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 25 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:40,100 INFO L93 Difference]: Finished difference Result 1387 states and 1785 transitions. [2022-01-10 06:52:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:52:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 25 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:40,101 INFO L225 Difference]: With dead ends: 1387 [2022-01-10 06:52:40,101 INFO L226 Difference]: Without dead ends: 785 [2022-01-10 06:52:40,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:40,103 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 148 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:40,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1500 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 114 Unchecked, 0.0s Time] [2022-01-10 06:52:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-10 06:52:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2022-01-10 06:52:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.2716836734693877) internal successors, (997), 784 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 997 transitions. [2022-01-10 06:52:40,132 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 997 transitions. Word has length 134 [2022-01-10 06:52:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:40,132 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 997 transitions. [2022-01-10 06:52:40,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 25 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 997 transitions. [2022-01-10 06:52:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:40,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:40,133 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:40,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 06:52:40,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:40,333 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash -903038359, now seen corresponding path program 1 times [2022-01-10 06:52:40,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:40,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983969696] [2022-01-10 06:52:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:40,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:40,335 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:40,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 06:52:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 38 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:41,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 38 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:42,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983969696] [2022-01-10 06:52:42,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983969696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:42,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:42,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:52:42,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851210955] [2022-01-10 06:52:42,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:42,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:52:42,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:42,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:52:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:52:42,512 INFO L87 Difference]: Start difference. First operand 785 states and 997 transitions. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 25 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:42,703 INFO L93 Difference]: Finished difference Result 1485 states and 1895 transitions. [2022-01-10 06:52:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:52:42,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 25 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:42,705 INFO L225 Difference]: With dead ends: 1485 [2022-01-10 06:52:42,705 INFO L226 Difference]: Without dead ends: 889 [2022-01-10 06:52:42,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:42,707 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 147 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:42,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1557 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 128 Unchecked, 0.0s Time] [2022-01-10 06:52:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-10 06:52:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 889. [2022-01-10 06:52:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.2556306306306306) internal successors, (1115), 888 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1115 transitions. [2022-01-10 06:52:42,748 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1115 transitions. Word has length 134 [2022-01-10 06:52:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:42,749 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1115 transitions. [2022-01-10 06:52:42,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 25 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1115 transitions. [2022-01-10 06:52:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:42,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:42,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:42,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:42,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:42,951 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1793371589, now seen corresponding path program 1 times [2022-01-10 06:52:42,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975198950] [2022-01-10 06:52:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:42,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:42,953 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 06:52:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:44,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:45,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975198950] [2022-01-10 06:52:45,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975198950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:45,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:45,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:52:45,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070293842] [2022-01-10 06:52:45,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:45,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:52:45,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:52:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:52:45,119 INFO L87 Difference]: Start difference. First operand 889 states and 1115 transitions. Second operand has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 25 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:45,309 INFO L93 Difference]: Finished difference Result 1689 states and 2127 transitions. [2022-01-10 06:52:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:52:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 25 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:45,311 INFO L225 Difference]: With dead ends: 1689 [2022-01-10 06:52:45,311 INFO L226 Difference]: Without dead ends: 1105 [2022-01-10 06:52:45,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:45,312 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 153 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:45,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1569 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 107 Unchecked, 0.0s Time] [2022-01-10 06:52:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-01-10 06:52:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1105. [2022-01-10 06:52:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.2346014492753623) internal successors, (1363), 1104 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1363 transitions. [2022-01-10 06:52:45,359 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1363 transitions. Word has length 134 [2022-01-10 06:52:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1363 transitions. [2022-01-10 06:52:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 25 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1363 transitions. [2022-01-10 06:52:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:45,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:45,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:45,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:45,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:45,562 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -264266485, now seen corresponding path program 1 times [2022-01-10 06:52:45,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:45,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420932650] [2022-01-10 06:52:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:45,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:45,563 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:45,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 06:52:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:52:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:52:46,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:52:47,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420932650] [2022-01-10 06:52:47,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420932650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:47,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:47,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:52:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252383905] [2022-01-10 06:52:47,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:52:47,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:52:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:47,300 INFO L87 Difference]: Start difference. First operand 1105 states and 1363 transitions. Second operand has 20 states, 20 states have (on average 11.35) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:47,429 INFO L93 Difference]: Finished difference Result 1750 states and 2208 transitions. [2022-01-10 06:52:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.35) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:47,431 INFO L225 Difference]: With dead ends: 1750 [2022-01-10 06:52:47,431 INFO L226 Difference]: Without dead ends: 1105 [2022-01-10 06:52:47,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:47,432 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 177 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:47,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 862 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 06:52:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-01-10 06:52:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1105. [2022-01-10 06:52:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.2309782608695652) internal successors, (1359), 1104 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1359 transitions. [2022-01-10 06:52:47,477 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1359 transitions. Word has length 134 [2022-01-10 06:52:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1359 transitions. [2022-01-10 06:52:47,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.35) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1359 transitions. [2022-01-10 06:52:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:47,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:47,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:47,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 06:52:47,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:47,679 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash -500151285, now seen corresponding path program 1 times [2022-01-10 06:52:47,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891091299] [2022-01-10 06:52:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:47,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:47,680 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:47,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 06:52:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:52:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:52:48,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:52:49,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891091299] [2022-01-10 06:52:49,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891091299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:49,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:49,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:52:49,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131592804] [2022-01-10 06:52:49,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:49,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:52:49,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:52:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:49,335 INFO L87 Difference]: Start difference. First operand 1105 states and 1359 transitions. Second operand has 20 states, 20 states have (on average 11.1) internal successors, (222), 19 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:49,484 INFO L93 Difference]: Finished difference Result 1946 states and 2429 transitions. [2022-01-10 06:52:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:49,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.1) internal successors, (222), 19 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:49,486 INFO L225 Difference]: With dead ends: 1946 [2022-01-10 06:52:49,486 INFO L226 Difference]: Without dead ends: 1297 [2022-01-10 06:52:49,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:49,487 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 145 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:49,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 780 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2022-01-10 06:52:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-01-10 06:52:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2022-01-10 06:52:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 1.2121913580246915) internal successors, (1571), 1296 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1571 transitions. [2022-01-10 06:52:49,545 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1571 transitions. Word has length 134 [2022-01-10 06:52:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:49,546 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1571 transitions. [2022-01-10 06:52:49,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.1) internal successors, (222), 19 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1571 transitions. [2022-01-10 06:52:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:49,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:49,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:49,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 06:52:49,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:49,748 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -30311669, now seen corresponding path program 1 times [2022-01-10 06:52:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599733910] [2022-01-10 06:52:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:49,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:49,750 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:49,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 06:52:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:52:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:52:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:52:51,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:51,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599733910] [2022-01-10 06:52:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599733910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:51,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:51,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:52:51,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097462897] [2022-01-10 06:52:51,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:52:51,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:52:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:52:51,315 INFO L87 Difference]: Start difference. First operand 1297 states and 1571 transitions. Second operand has 20 states, 20 states have (on average 10.85) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:51,496 INFO L93 Difference]: Finished difference Result 1950 states and 2426 transitions. [2022-01-10 06:52:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.85) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-01-10 06:52:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:51,498 INFO L225 Difference]: With dead ends: 1950 [2022-01-10 06:52:51,498 INFO L226 Difference]: Without dead ends: 1297 [2022-01-10 06:52:51,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:51,503 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 131 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:51,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 915 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 112 Unchecked, 0.0s Time] [2022-01-10 06:52:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-01-10 06:52:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2022-01-10 06:52:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 1.2060185185185186) internal successors, (1563), 1296 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1563 transitions. [2022-01-10 06:52:51,582 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1563 transitions. Word has length 134 [2022-01-10 06:52:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:51,582 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1563 transitions. [2022-01-10 06:52:51,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.85) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1563 transitions. [2022-01-10 06:52:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 06:52:51,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:51,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:52:51,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:51,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:51,793 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -939316725, now seen corresponding path program 1 times [2022-01-10 06:52:51,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:51,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739542522] [2022-01-10 06:52:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:51,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:51,795 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:51,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 06:52:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:51,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:52:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates...