/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:08:36,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:08:36,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:08:36,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:08:36,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:08:36,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:08:36,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:08:36,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:08:36,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:08:36,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:08:36,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:08:36,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:08:36,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:08:36,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:08:36,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:08:36,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:08:36,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:08:36,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:08:36,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:08:36,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:08:36,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:08:36,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:08:36,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:08:36,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:08:36,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:08:36,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:08:36,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:08:36,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:08:36,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 07:08:36,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:08:36,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:08:36,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:08:36,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:08:36,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:08:36,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:08:36,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:08:36,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:08:36,378 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:08:36,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:08:36,379 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:08:36,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:08:36,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:08:36,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:08:36,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:08:36,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:08:36,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:08:36,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:08:36,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:08:36,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:08:36,382 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:08:36,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:08:36,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:08:36,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:08:36,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:08:36,610 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:08:36,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:08:36,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63e85d728/8f302132156c40b88b826ce95b78da55/FLAG9c8e45b19 [2022-01-10 07:08:37,104 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:08:37,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:08:37,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63e85d728/8f302132156c40b88b826ce95b78da55/FLAG9c8e45b19 [2022-01-10 07:08:37,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63e85d728/8f302132156c40b88b826ce95b78da55 [2022-01-10 07:08:37,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:08:37,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:08:37,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:08:37,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:08:37,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:08:37,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19512fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37, skipping insertion in model container [2022-01-10 07:08:37,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:08:37,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:08:37,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-01-10 07:08:37,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:08:37,426 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:08:37,466 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-01-10 07:08:37,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:08:37,523 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:08:37,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37 WrapperNode [2022-01-10 07:08:37,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:08:37,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:08:37,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:08:37,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:08:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,590 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 411 [2022-01-10 07:08:37,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:08:37,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:08:37,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:08:37,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:08:37,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:08:37,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:08:37,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:08:37,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:08:37,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (1/1) ... [2022-01-10 07:08:37,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:08:37,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:08:37,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 07:08:37,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 07:08:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:08:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:08:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:08:37,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:08:37,873 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:08:37,874 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:08:38,262 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:08:38,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:08:38,270 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:08:38,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:08:38 BoogieIcfgContainer [2022-01-10 07:08:38,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:08:38,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:08:38,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:08:38,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:08:38,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:08:37" (1/3) ... [2022-01-10 07:08:38,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b106cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:08:38, skipping insertion in model container [2022-01-10 07:08:38,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:37" (2/3) ... [2022-01-10 07:08:38,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b106cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:08:38, skipping insertion in model container [2022-01-10 07:08:38,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:08:38" (3/3) ... [2022-01-10 07:08:38,278 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 07:08:38,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:08:38,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:08:38,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:08:38,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 07:08:38,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:08:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:08:38,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:38,356 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] [2022-01-10 07:08:38,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:38,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2117585175, now seen corresponding path program 1 times [2022-01-10 07:08:38,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:38,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509405585] [2022-01-10 07:08:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:38,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:38,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:38,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:38,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 07:08:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:38,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:38,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509405585] [2022-01-10 07:08:38,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509405585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:38,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:38,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391445150] [2022-01-10 07:08:38,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:38,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:38,675 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:38,726 INFO L93 Difference]: Finished difference Result 266 states and 425 transitions. [2022-01-10 07:08:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-01-10 07:08:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:38,739 INFO L225 Difference]: With dead ends: 266 [2022-01-10 07:08:38,739 INFO L226 Difference]: Without dead ends: 175 [2022-01-10 07:08:38,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:38,749 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 130 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:38,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-10 07:08:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-01-10 07:08:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.505813953488372) internal successors, (259), 172 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2022-01-10 07:08:38,810 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 49 [2022-01-10 07:08:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:38,810 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2022-01-10 07:08:38,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2022-01-10 07:08:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:08:38,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:38,812 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] [2022-01-10 07:08:38,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:39,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:39,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1419109229, now seen corresponding path program 1 times [2022-01-10 07:08:39,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:39,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290174040] [2022-01-10 07:08:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:39,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:39,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:39,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 07:08:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:39,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:39,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:39,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:39,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290174040] [2022-01-10 07:08:39,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290174040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:39,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:39,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:39,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979379488] [2022-01-10 07:08:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:39,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:39,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:39,225 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:39,274 INFO L93 Difference]: Finished difference Result 433 states and 671 transitions. [2022-01-10 07:08:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-01-10 07:08:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:39,282 INFO L225 Difference]: With dead ends: 433 [2022-01-10 07:08:39,282 INFO L226 Difference]: Without dead ends: 287 [2022-01-10 07:08:39,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:39,284 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 108 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:39,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 329 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-10 07:08:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-01-10 07:08:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5352112676056338) internal successors, (436), 284 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2022-01-10 07:08:39,326 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 50 [2022-01-10 07:08:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:39,326 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2022-01-10 07:08:39,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2022-01-10 07:08:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 07:08:39,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:39,328 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 07:08:39,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:39,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:39,529 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1570665396, now seen corresponding path program 1 times [2022-01-10 07:08:39,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:39,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192253817] [2022-01-10 07:08:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:39,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:39,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 07:08:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:39,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:39,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192253817] [2022-01-10 07:08:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192253817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:39,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:39,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:39,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021873419] [2022-01-10 07:08:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:39,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:39,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:39,740 INFO L87 Difference]: Start difference. First operand 285 states and 436 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 07:08:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:39,772 INFO L93 Difference]: Finished difference Result 737 states and 1150 transitions. [2022-01-10 07:08:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:39,772 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 07:08:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:39,776 INFO L225 Difference]: With dead ends: 737 [2022-01-10 07:08:39,776 INFO L226 Difference]: Without dead ends: 479 [2022-01-10 07:08:39,780 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 07:08:39,781 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 103 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-10 07:08:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-01-10 07:08:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.546218487394958) internal successors, (736), 476 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 736 transitions. [2022-01-10 07:08:39,816 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 736 transitions. Word has length 51 [2022-01-10 07:08:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:39,818 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 736 transitions. [2022-01-10 07:08:39,818 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 07:08:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 736 transitions. [2022-01-10 07:08:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 07:08:39,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:39,825 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] [2022-01-10 07:08:39,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:40,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:40,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1205622842, now seen corresponding path program 1 times [2022-01-10 07:08:40,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896355887] [2022-01-10 07:08:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:40,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:40,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:40,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 07:08:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:40,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:40,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:40,895 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896355887] [2022-01-10 07:08:40,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896355887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:40,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:40,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:08:40,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008438187] [2022-01-10 07:08:40,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:40,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:40,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:40,898 INFO L87 Difference]: Start difference. First operand 477 states and 736 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:40,924 INFO L93 Difference]: Finished difference Result 965 states and 1501 transitions. [2022-01-10 07:08:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:40,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-01-10 07:08:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:40,927 INFO L225 Difference]: With dead ends: 965 [2022-01-10 07:08:40,927 INFO L226 Difference]: Without dead ends: 515 [2022-01-10 07:08:40,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:40,929 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 67 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:40,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 423 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-01-10 07:08:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-10 07:08:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 507. [2022-01-10 07:08:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.5395256916996047) internal successors, (779), 506 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 779 transitions. [2022-01-10 07:08:40,947 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 779 transitions. Word has length 52 [2022-01-10 07:08:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:40,947 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 779 transitions. [2022-01-10 07:08:40,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 779 transitions. [2022-01-10 07:08:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 07:08:40,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:40,949 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 07:08:40,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 07:08:41,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:41,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1744489678, now seen corresponding path program 1 times [2022-01-10 07:08:41,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:41,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409332491] [2022-01-10 07:08:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:41,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:41,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:41,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 07:08:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:41,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:41,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409332491] [2022-01-10 07:08:41,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409332491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:41,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:41,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748262101] [2022-01-10 07:08:41,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:41,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:41,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:41,328 INFO L87 Difference]: Start difference. First operand 507 states and 779 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 07:08:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:41,368 INFO L93 Difference]: Finished difference Result 1263 states and 1965 transitions. [2022-01-10 07:08:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:41,369 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 07:08:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:41,373 INFO L225 Difference]: With dead ends: 1263 [2022-01-10 07:08:41,373 INFO L226 Difference]: Without dead ends: 813 [2022-01-10 07:08:41,374 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 07:08:41,374 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 115 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:41,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 369 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-10 07:08:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 811. [2022-01-10 07:08:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.5382716049382716) internal successors, (1246), 810 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1246 transitions. [2022-01-10 07:08:41,420 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1246 transitions. Word has length 53 [2022-01-10 07:08:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:41,421 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1246 transitions. [2022-01-10 07:08:41,421 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 07:08:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1246 transitions. [2022-01-10 07:08:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:08:41,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:41,423 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 07:08:41,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:41,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:41,633 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1689386392, now seen corresponding path program 1 times [2022-01-10 07:08:41,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568498969] [2022-01-10 07:08:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:41,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:41,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:41,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 07:08:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:42,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:42,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568498969] [2022-01-10 07:08:42,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568498969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:42,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:42,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:08:42,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118895353] [2022-01-10 07:08:42,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:42,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:42,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:42,164 INFO L87 Difference]: Start difference. First operand 811 states and 1246 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 07:08:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:42,362 INFO L93 Difference]: Finished difference Result 4581 states and 7131 transitions. [2022-01-10 07:08:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 07:08:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:42,378 INFO L225 Difference]: With dead ends: 4581 [2022-01-10 07:08:42,378 INFO L226 Difference]: Without dead ends: 3827 [2022-01-10 07:08:42,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 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 07:08:42,384 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1014 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:42,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 659 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:08:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-01-10 07:08:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 1563. [2022-01-10 07:08:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 1.530089628681178) internal successors, (2390), 1562 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2390 transitions. [2022-01-10 07:08:42,506 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2390 transitions. Word has length 54 [2022-01-10 07:08:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:42,507 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2390 transitions. [2022-01-10 07:08:42,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 07:08:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2390 transitions. [2022-01-10 07:08:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 07:08:42,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:42,508 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, 1] [2022-01-10 07:08:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:42,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:42,717 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -850826877, now seen corresponding path program 1 times [2022-01-10 07:08:42,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:42,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324679] [2022-01-10 07:08:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:42,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:42,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:42,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 07:08:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:08:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:42,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:42,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324679] [2022-01-10 07:08:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:42,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:42,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963278249] [2022-01-10 07:08:42,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:42,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:08:42,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:08:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:08:42,886 INFO L87 Difference]: Start difference. First operand 1563 states and 2390 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:43,038 INFO L93 Difference]: Finished difference Result 3133 states and 4775 transitions. [2022-01-10 07:08:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:08:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-01-10 07:08:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:43,051 INFO L225 Difference]: With dead ends: 3133 [2022-01-10 07:08:43,051 INFO L226 Difference]: Without dead ends: 3131 [2022-01-10 07:08:43,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:43,053 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 248 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:43,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 541 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-01-10 07:08:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 1627. [2022-01-10 07:08:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 1.5092250922509225) internal successors, (2454), 1626 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2454 transitions. [2022-01-10 07:08:43,187 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2454 transitions. Word has length 55 [2022-01-10 07:08:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:43,188 INFO L470 AbstractCegarLoop]: Abstraction has 1627 states and 2454 transitions. [2022-01-10 07:08:43,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2454 transitions. [2022-01-10 07:08:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 07:08:43,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:43,192 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, 1, 1] [2022-01-10 07:08:43,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:43,401 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash -595256360, now seen corresponding path program 1 times [2022-01-10 07:08:43,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553379978] [2022-01-10 07:08:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:43,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:43,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:43,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 07:08:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:43,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:43,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:43,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:43,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553379978] [2022-01-10 07:08:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553379978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:43,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:43,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:43,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7693796] [2022-01-10 07:08:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:43,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:43,592 INFO L87 Difference]: Start difference. First operand 1627 states and 2454 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:43,704 INFO L93 Difference]: Finished difference Result 4015 states and 6080 transitions. [2022-01-10 07:08:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-01-10 07:08:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:43,713 INFO L225 Difference]: With dead ends: 4015 [2022-01-10 07:08:43,713 INFO L226 Difference]: Without dead ends: 2445 [2022-01-10 07:08:43,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:43,721 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 92 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 281 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 07:08:43,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 281 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2022-01-10 07:08:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2427. [2022-01-10 07:08:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 1.5028854080791427) internal successors, (3646), 2426 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3646 transitions. [2022-01-10 07:08:43,853 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3646 transitions. Word has length 56 [2022-01-10 07:08:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:43,854 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 3646 transitions. [2022-01-10 07:08:43,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3646 transitions. [2022-01-10 07:08:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:43,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:43,856 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 07:08:43,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:44,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:44,066 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash -264442661, now seen corresponding path program 1 times [2022-01-10 07:08:44,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371967252] [2022-01-10 07:08:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:44,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:44,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:44,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 07:08:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:45,073 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 07:08:45,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:45,401 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 07:08:45,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371967252] [2022-01-10 07:08:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371967252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:45,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:45,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755643401] [2022-01-10 07:08:45,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:45,404 INFO L87 Difference]: Start difference. First operand 2427 states and 3646 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:45,635 INFO L93 Difference]: Finished difference Result 4856 states and 7314 transitions. [2022-01-10 07:08:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:08:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 07:08:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:45,644 INFO L225 Difference]: With dead ends: 4856 [2022-01-10 07:08:45,644 INFO L226 Difference]: Without dead ends: 2486 [2022-01-10 07:08:45,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-10 07:08:45,650 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 167 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:45,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1066 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-01-10 07:08:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-01-10 07:08:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2466. [2022-01-10 07:08:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 1.500608519269777) internal successors, (3699), 2465 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3699 transitions. [2022-01-10 07:08:45,780 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3699 transitions. Word has length 79 [2022-01-10 07:08:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:45,780 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 3699 transitions. [2022-01-10 07:08:45,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3699 transitions. [2022-01-10 07:08:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:45,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:45,783 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] [2022-01-10 07:08:45,797 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 07:08:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:45,992 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2142394861, now seen corresponding path program 1 times [2022-01-10 07:08:45,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:45,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670875858] [2022-01-10 07:08:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:45,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:45,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:45,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:45,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 07:08:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:46,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:46,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:46,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670875858] [2022-01-10 07:08:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670875858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:46,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:46,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:46,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045781945] [2022-01-10 07:08:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:46,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:46,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:46,201 INFO L87 Difference]: Start difference. First operand 2466 states and 3699 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 07:08:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:46,286 INFO L93 Difference]: Finished difference Result 4088 states and 6154 transitions. [2022-01-10 07:08:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:46,286 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 07:08:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:46,291 INFO L225 Difference]: With dead ends: 4088 [2022-01-10 07:08:46,291 INFO L226 Difference]: Without dead ends: 1712 [2022-01-10 07:08:46,294 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 07:08:46,294 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 90 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:46,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 332 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-01-10 07:08:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1710. [2022-01-10 07:08:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4915155061439438) internal successors, (2549), 1709 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2549 transitions. [2022-01-10 07:08:46,411 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2549 transitions. Word has length 79 [2022-01-10 07:08:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:46,411 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2549 transitions. [2022-01-10 07:08:46,411 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 07:08:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2549 transitions. [2022-01-10 07:08:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:46,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:46,413 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 07:08:46,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:46,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:46,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1198600736, now seen corresponding path program 1 times [2022-01-10 07:08:46,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:46,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114041203] [2022-01-10 07:08:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:46,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:46,626 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:46,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 07:08:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:46,967 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 07:08:46,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:46,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114041203] [2022-01-10 07:08:46,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114041203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:46,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:46,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:46,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935155284] [2022-01-10 07:08:46,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:46,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:46,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:46,969 INFO L87 Difference]: Start difference. First operand 1710 states and 2549 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 07:08:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:47,119 INFO L93 Difference]: Finished difference Result 3330 states and 4986 transitions. [2022-01-10 07:08:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 79 [2022-01-10 07:08:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:47,126 INFO L225 Difference]: With dead ends: 3330 [2022-01-10 07:08:47,126 INFO L226 Difference]: Without dead ends: 1710 [2022-01-10 07:08:47,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:47,129 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 25 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:47,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 313 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-01-10 07:08:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-01-10 07:08:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1710. [2022-01-10 07:08:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4909303686366295) internal successors, (2548), 1709 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2548 transitions. [2022-01-10 07:08:47,205 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2548 transitions. Word has length 79 [2022-01-10 07:08:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:47,205 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2548 transitions. [2022-01-10 07:08:47,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 07:08:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2548 transitions. [2022-01-10 07:08:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:47,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:47,207 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 07:08:47,216 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 07:08:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:47,416 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -870577806, now seen corresponding path program 1 times [2022-01-10 07:08:47,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247664600] [2022-01-10 07:08:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:47,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:47,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:47,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:47,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 07:08:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:47,790 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 07:08:47,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:47,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:47,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247664600] [2022-01-10 07:08:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247664600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:47,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:47,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:47,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423778676] [2022-01-10 07:08:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:47,792 INFO L87 Difference]: Start difference. First operand 1710 states and 2548 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 07:08:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:47,912 INFO L93 Difference]: Finished difference Result 3323 states and 4975 transitions. [2022-01-10 07:08:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 79 [2022-01-10 07:08:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:47,918 INFO L225 Difference]: With dead ends: 3323 [2022-01-10 07:08:47,918 INFO L226 Difference]: Without dead ends: 1716 [2022-01-10 07:08:47,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:47,921 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 36 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:47,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 328 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-01-10 07:08:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-01-10 07:08:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1715. [2022-01-10 07:08:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 1.4900816802800467) internal successors, (2554), 1714 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2554 transitions. [2022-01-10 07:08:47,998 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2554 transitions. Word has length 79 [2022-01-10 07:08:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:47,998 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 2554 transitions. [2022-01-10 07:08:47,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 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 07:08:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2554 transitions. [2022-01-10 07:08:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:48,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:48,000 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 07:08:48,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:48,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:48,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1139852905, now seen corresponding path program 1 times [2022-01-10 07:08:48,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:48,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189177580] [2022-01-10 07:08:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:48,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:48,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:48,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:48,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 07:08:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:49,155 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 07:08:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:49,481 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 07:08:49,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189177580] [2022-01-10 07:08:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189177580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:49,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:49,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:49,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294405010] [2022-01-10 07:08:49,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:49,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:49,483 INFO L87 Difference]: Start difference. First operand 1715 states and 2554 transitions. Second operand has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:50,061 INFO L93 Difference]: Finished difference Result 4676 states and 6982 transitions. [2022-01-10 07:08:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:08:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:08:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:50,073 INFO L225 Difference]: With dead ends: 4676 [2022-01-10 07:08:50,073 INFO L226 Difference]: Without dead ends: 3106 [2022-01-10 07:08:50,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-10 07:08:50,076 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 324 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:50,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2056 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 564 Invalid, 0 Unknown, 361 Unchecked, 0.3s Time] [2022-01-10 07:08:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2022-01-10 07:08:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2972. [2022-01-10 07:08:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 1.4729047458768092) internal successors, (4376), 2971 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 4376 transitions. [2022-01-10 07:08:50,220 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 4376 transitions. Word has length 79 [2022-01-10 07:08:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 4376 transitions. [2022-01-10 07:08:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 4376 transitions. [2022-01-10 07:08:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:50,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:50,223 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 07:08:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:50,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:50,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash 676888608, now seen corresponding path program 1 times [2022-01-10 07:08:50,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722338584] [2022-01-10 07:08:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:50,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:50,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:50,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 07:08:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:50,748 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 07:08:50,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:50,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722338584] [2022-01-10 07:08:50,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722338584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:50,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:50,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:50,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285314226] [2022-01-10 07:08:50,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:50,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:50,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:50,750 INFO L87 Difference]: Start difference. First operand 2972 states and 4376 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 07:08:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:50,941 INFO L93 Difference]: Finished difference Result 5742 states and 8492 transitions. [2022-01-10 07:08:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 79 [2022-01-10 07:08:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:50,959 INFO L225 Difference]: With dead ends: 5742 [2022-01-10 07:08:50,959 INFO L226 Difference]: Without dead ends: 2980 [2022-01-10 07:08:50,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:50,963 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 35 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:50,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 337 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-01-10 07:08:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2022-01-10 07:08:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2978. [2022-01-10 07:08:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 1.4726234464225731) internal successors, (4384), 2977 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 4384 transitions. [2022-01-10 07:08:51,124 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 4384 transitions. Word has length 79 [2022-01-10 07:08:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:51,124 INFO L470 AbstractCegarLoop]: Abstraction has 2978 states and 4384 transitions. [2022-01-10 07:08:51,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 07:08:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 4384 transitions. [2022-01-10 07:08:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:51,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:51,127 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 07:08:51,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:51,336 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -390656805, now seen corresponding path program 1 times [2022-01-10 07:08:51,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:51,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319056064] [2022-01-10 07:08:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:51,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:51,338 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:51,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 07:08:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:52,227 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 07:08:52,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:52,580 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 07:08:52,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319056064] [2022-01-10 07:08:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319056064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:52,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67172991] [2022-01-10 07:08:52,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:52,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:52,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:52,582 INFO L87 Difference]: Start difference. First operand 2978 states and 4384 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:53,138 INFO L93 Difference]: Finished difference Result 8012 states and 11798 transitions. [2022-01-10 07:08:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:08:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 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 07:08:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:53,149 INFO L225 Difference]: With dead ends: 8012 [2022-01-10 07:08:53,149 INFO L226 Difference]: Without dead ends: 5274 [2022-01-10 07:08:53,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-10 07:08:53,156 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 562 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:53,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1721 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 395 Invalid, 0 Unknown, 561 Unchecked, 0.2s Time] [2022-01-10 07:08:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5274 states. [2022-01-10 07:08:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5274 to 4900. [2022-01-10 07:08:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4899 states have (on average 1.456827924066136) internal successors, (7137), 4899 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 7137 transitions. [2022-01-10 07:08:53,388 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 7137 transitions. Word has length 79 [2022-01-10 07:08:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:53,389 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 7137 transitions. [2022-01-10 07:08:53,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 7137 transitions. [2022-01-10 07:08:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:53,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:53,392 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 07:08:53,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:53,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:53,601 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash -265525390, now seen corresponding path program 1 times [2022-01-10 07:08:53,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:53,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406119063] [2022-01-10 07:08:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:53,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:53,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:53,603 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 07:08:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:53,947 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 07:08:53,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:53,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406119063] [2022-01-10 07:08:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406119063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:53,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:53,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034735673] [2022-01-10 07:08:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:53,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:53,949 INFO L87 Difference]: Start difference. First operand 4900 states and 7137 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:54,170 INFO L93 Difference]: Finished difference Result 9471 states and 13853 transitions. [2022-01-10 07:08:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 07:08:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:54,179 INFO L225 Difference]: With dead ends: 9471 [2022-01-10 07:08:54,179 INFO L226 Difference]: Without dead ends: 4908 [2022-01-10 07:08:54,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:54,186 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 33 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:54,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 349 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-01-10 07:08:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2022-01-10 07:08:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 4906. [2022-01-10 07:08:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 1.456472986748216) internal successors, (7144), 4905 states have internal predecessors, (7144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7144 transitions. [2022-01-10 07:08:54,431 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7144 transitions. Word has length 79 [2022-01-10 07:08:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:54,431 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 7144 transitions. [2022-01-10 07:08:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7144 transitions. [2022-01-10 07:08:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:08:54,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:54,435 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 07:08:54,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:54,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:54,644 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -422473257, now seen corresponding path program 1 times [2022-01-10 07:08:54,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:54,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069275366] [2022-01-10 07:08:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:54,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:54,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:54,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 07:08:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:55,222 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 07:08:55,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:55,613 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 07:08:55,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069275366] [2022-01-10 07:08:55,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069275366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:55,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:55,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:55,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381629813] [2022-01-10 07:08:55,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:55,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:55,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:55,615 INFO L87 Difference]: Start difference. First operand 4906 states and 7144 transitions. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:56,160 INFO L93 Difference]: Finished difference Result 13272 states and 19273 transitions. [2022-01-10 07:08:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 07:08:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 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 07:08:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:56,174 INFO L225 Difference]: With dead ends: 13272 [2022-01-10 07:08:56,174 INFO L226 Difference]: Without dead ends: 8720 [2022-01-10 07:08:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:08:56,181 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 209 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1314 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 265 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-01-10 07:08:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2022-01-10 07:08:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 8186. [2022-01-10 07:08:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8186 states, 8185 states have (on average 1.4434941967012829) internal successors, (11815), 8185 states have internal predecessors, (11815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8186 states to 8186 states and 11815 transitions. [2022-01-10 07:08:56,582 INFO L78 Accepts]: Start accepts. Automaton has 8186 states and 11815 transitions. Word has length 79 [2022-01-10 07:08:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:56,582 INFO L470 AbstractCegarLoop]: Abstraction has 8186 states and 11815 transitions. [2022-01-10 07:08:56,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8186 states and 11815 transitions. [2022-01-10 07:08:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:08:56,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:56,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:56,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:56,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:56,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:56,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1770152017, now seen corresponding path program 1 times [2022-01-10 07:08:56,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655478218] [2022-01-10 07:08:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:56,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:56,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:56,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 07:08:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:56,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:56,966 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655478218] [2022-01-10 07:08:56,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655478218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:56,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:56,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:56,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801415293] [2022-01-10 07:08:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:56,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:56,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:56,967 INFO L87 Difference]: Start difference. First operand 8186 states and 11815 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 07:08:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:57,129 INFO L93 Difference]: Finished difference Result 12032 states and 17409 transitions. [2022-01-10 07:08:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:57,129 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 07:08:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:57,136 INFO L225 Difference]: With dead ends: 12032 [2022-01-10 07:08:57,136 INFO L226 Difference]: Without dead ends: 4288 [2022-01-10 07:08:57,145 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 07:08:57,146 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 71 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:57,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 313 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2022-01-10 07:08:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 4286. [2022-01-10 07:08:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 1.4198366394399067) internal successors, (6084), 4285 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6084 transitions. [2022-01-10 07:08:57,386 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6084 transitions. Word has length 80 [2022-01-10 07:08:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:57,386 INFO L470 AbstractCegarLoop]: Abstraction has 4286 states and 6084 transitions. [2022-01-10 07:08:57,386 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 07:08:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6084 transitions. [2022-01-10 07:08:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:08:57,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:57,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:57,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:57,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:57,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1122786804, now seen corresponding path program 1 times [2022-01-10 07:08:57,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144338227] [2022-01-10 07:08:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:57,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:57,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:57,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:57,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 07:08:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:57,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:57,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144338227] [2022-01-10 07:08:57,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144338227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:57,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:57,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:57,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960546368] [2022-01-10 07:08:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:57,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:57,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:57,770 INFO L87 Difference]: Start difference. First operand 4286 states and 6084 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 07:08:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:57,961 INFO L93 Difference]: Finished difference Result 9615 states and 13785 transitions. [2022-01-10 07:08:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:57,962 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 07:08:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:57,972 INFO L225 Difference]: With dead ends: 9615 [2022-01-10 07:08:57,972 INFO L226 Difference]: Without dead ends: 5771 [2022-01-10 07:08:57,978 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 07:08:57,978 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 91 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:57,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 328 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2022-01-10 07:08:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5277. [2022-01-10 07:08:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 1.4224791508718726) internal successors, (7505), 5276 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 7505 transitions. [2022-01-10 07:08:58,265 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 7505 transitions. Word has length 80 [2022-01-10 07:08:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:58,265 INFO L470 AbstractCegarLoop]: Abstraction has 5277 states and 7505 transitions. [2022-01-10 07:08:58,265 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 07:08:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 7505 transitions. [2022-01-10 07:08:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:08:58,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:58,269 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 07:08:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:58,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:58,478 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:58,479 INFO L85 PathProgramCache]: Analyzing trace with hash 411372883, now seen corresponding path program 1 times [2022-01-10 07:08:58,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:58,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573766897] [2022-01-10 07:08:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:58,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:58,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:58,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 07:08:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:08:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:08:58,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:08:58,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573766897] [2022-01-10 07:08:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573766897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:58,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:58,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:08:58,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318492497] [2022-01-10 07:08:58,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:58,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:58,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:58,877 INFO L87 Difference]: Start difference. First operand 5277 states and 7505 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 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 07:08:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:59,603 INFO L93 Difference]: Finished difference Result 20089 states and 28743 transitions. [2022-01-10 07:08:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:08:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 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 80 [2022-01-10 07:08:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:59,623 INFO L225 Difference]: With dead ends: 20089 [2022-01-10 07:08:59,623 INFO L226 Difference]: Without dead ends: 15271 [2022-01-10 07:08:59,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:08:59,632 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 466 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:59,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 780 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-10 07:08:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15271 states. [2022-01-10 07:09:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15271 to 15061. [2022-01-10 07:09:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15061 states, 15060 states have (on average 1.4084329349269589) internal successors, (21211), 15060 states have internal predecessors, (21211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15061 states to 15061 states and 21211 transitions. [2022-01-10 07:09:00,383 INFO L78 Accepts]: Start accepts. Automaton has 15061 states and 21211 transitions. Word has length 80 [2022-01-10 07:09:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:00,383 INFO L470 AbstractCegarLoop]: Abstraction has 15061 states and 21211 transitions. [2022-01-10 07:09:00,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 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 07:09:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15061 states and 21211 transitions. [2022-01-10 07:09:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:09:00,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:00,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:00,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:00,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:00,596 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash -982701471, now seen corresponding path program 1 times [2022-01-10 07:09:00,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:00,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836747766] [2022-01-10 07:09:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:00,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:00,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:00,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 07:09:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:09:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:00,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:09:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:00,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836747766] [2022-01-10 07:09:00,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836747766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:09:00,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:09:00,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:09:00,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832053559] [2022-01-10 07:09:00,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:09:00,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:09:00,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:09:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:09:00,957 INFO L87 Difference]: Start difference. First operand 15061 states and 21211 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:02,418 INFO L93 Difference]: Finished difference Result 41268 states and 57637 transitions. [2022-01-10 07:09:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:09:02,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 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 07:09:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:02,451 INFO L225 Difference]: With dead ends: 41268 [2022-01-10 07:09:02,452 INFO L226 Difference]: Without dead ends: 26474 [2022-01-10 07:09:02,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:09:02,470 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 880 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:02,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 397 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:09:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26474 states. [2022-01-10 07:09:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26474 to 16313. [2022-01-10 07:09:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16313 states, 16312 states have (on average 1.3693599803825405) internal successors, (22337), 16312 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16313 states to 16313 states and 22337 transitions. [2022-01-10 07:09:03,451 INFO L78 Accepts]: Start accepts. Automaton has 16313 states and 22337 transitions. Word has length 80 [2022-01-10 07:09:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:03,451 INFO L470 AbstractCegarLoop]: Abstraction has 16313 states and 22337 transitions. [2022-01-10 07:09:03,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16313 states and 22337 transitions. [2022-01-10 07:09:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:09:03,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:03,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:03,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:03,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:03,664 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash 706382197, now seen corresponding path program 1 times [2022-01-10 07:09:03,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320901103] [2022-01-10 07:09:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:03,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:03,667 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:03,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 07:09:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:09:03,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:03,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:09:03,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320901103] [2022-01-10 07:09:03,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320901103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:09:03,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:09:03,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:09:03,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830376536] [2022-01-10 07:09:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:09:03,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:09:03,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:09:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:09:03,858 INFO L87 Difference]: Start difference. First operand 16313 states and 22337 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 07:09:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:05,038 INFO L93 Difference]: Finished difference Result 35344 states and 48442 transitions. [2022-01-10 07:09:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:09:05,038 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 07:09:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:05,068 INFO L225 Difference]: With dead ends: 35344 [2022-01-10 07:09:05,068 INFO L226 Difference]: Without dead ends: 20228 [2022-01-10 07:09:05,088 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 07:09:05,090 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 90 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:05,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 343 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:09:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20228 states. [2022-01-10 07:09:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20228 to 17947. [2022-01-10 07:09:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17947 states, 17946 states have (on average 1.3620305360526022) internal successors, (24443), 17946 states have internal predecessors, (24443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17947 states to 17947 states and 24443 transitions. [2022-01-10 07:09:06,210 INFO L78 Accepts]: Start accepts. Automaton has 17947 states and 24443 transitions. Word has length 80 [2022-01-10 07:09:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:06,210 INFO L470 AbstractCegarLoop]: Abstraction has 17947 states and 24443 transitions. [2022-01-10 07:09:06,210 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 07:09:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 17947 states and 24443 transitions. [2022-01-10 07:09:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:09:06,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:06,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:06,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:06,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:06,423 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -245126984, now seen corresponding path program 1 times [2022-01-10 07:09:06,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537868039] [2022-01-10 07:09:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:06,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:06,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:06,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:06,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 07:09:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:09:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:09:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:06,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537868039] [2022-01-10 07:09:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537868039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:09:06,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:09:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:09:06,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436684265] [2022-01-10 07:09:06,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:09:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:09:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:09:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:09:06,794 INFO L87 Difference]: Start difference. First operand 17947 states and 24443 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 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 07:09:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:08,900 INFO L93 Difference]: Finished difference Result 53688 states and 72790 transitions. [2022-01-10 07:09:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 07:09:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 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 80 [2022-01-10 07:09:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:08,954 INFO L225 Difference]: With dead ends: 53688 [2022-01-10 07:09:08,954 INFO L226 Difference]: Without dead ends: 36049 [2022-01-10 07:09:08,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:09:08,975 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 962 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:08,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 367 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:09:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36049 states. [2022-01-10 07:09:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36049 to 29017. [2022-01-10 07:09:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29017 states, 29016 states have (on average 1.3355390129583677) internal successors, (38752), 29016 states have internal predecessors, (38752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29017 states to 29017 states and 38752 transitions. [2022-01-10 07:09:10,935 INFO L78 Accepts]: Start accepts. Automaton has 29017 states and 38752 transitions. Word has length 80 [2022-01-10 07:09:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:10,935 INFO L470 AbstractCegarLoop]: Abstraction has 29017 states and 38752 transitions. [2022-01-10 07:09:10,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 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 07:09:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29017 states and 38752 transitions. [2022-01-10 07:09:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:09:10,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:10,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:10,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 07:09:11,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:11,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash 579942040, now seen corresponding path program 1 times [2022-01-10 07:09:11,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477851631] [2022-01-10 07:09:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:11,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:11,141 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:11,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 07:09:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:09:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:11,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:09:11,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477851631] [2022-01-10 07:09:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477851631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:09:11,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:09:11,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:09:11,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71211701] [2022-01-10 07:09:11,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:09:11,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:09:11,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:09:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:09:11,310 INFO L87 Difference]: Start difference. First operand 29017 states and 38752 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 07:09:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:13,470 INFO L93 Difference]: Finished difference Result 64773 states and 86700 transitions. [2022-01-10 07:09:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:09:13,470 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 07:09:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:13,523 INFO L225 Difference]: With dead ends: 64773 [2022-01-10 07:09:13,523 INFO L226 Difference]: Without dead ends: 38339 [2022-01-10 07:09:13,556 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 07:09:13,557 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 90 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:13,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 356 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:09:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38339 states. [2022-01-10 07:09:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38339 to 38173. [2022-01-10 07:09:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38173 states, 38172 states have (on average 1.3272031855810542) internal successors, (50662), 38172 states have internal predecessors, (50662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38173 states to 38173 states and 50662 transitions. [2022-01-10 07:09:16,172 INFO L78 Accepts]: Start accepts. Automaton has 38173 states and 50662 transitions. Word has length 80 [2022-01-10 07:09:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 38173 states and 50662 transitions. [2022-01-10 07:09:16,172 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 07:09:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38173 states and 50662 transitions. [2022-01-10 07:09:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:09:16,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:16,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:16,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:16,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:16,376 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1586682651, now seen corresponding path program 1 times [2022-01-10 07:09:16,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330190119] [2022-01-10 07:09:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:16,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:16,378 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:16,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:09:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:09:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:16,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:09:16,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330190119] [2022-01-10 07:09:16,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330190119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:09:16,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:09:16,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:09:16,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823036496] [2022-01-10 07:09:16,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:09:16,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:09:16,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:09:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:09:16,549 INFO L87 Difference]: Start difference. First operand 38173 states and 50662 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 07:09:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:19,711 INFO L93 Difference]: Finished difference Result 92024 states and 122306 transitions. [2022-01-10 07:09:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:09:19,712 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 07:09:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:19,788 INFO L225 Difference]: With dead ends: 92024 [2022-01-10 07:09:19,788 INFO L226 Difference]: Without dead ends: 54750 [2022-01-10 07:09:19,816 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 07:09:19,817 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 85 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 326 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:09:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54750 states. [2022-01-10 07:09:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54750 to 54748. [2022-01-10 07:09:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54748 states, 54747 states have (on average 1.3186293312875592) internal successors, (72191), 54747 states have internal predecessors, (72191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54748 states to 54748 states and 72191 transitions. [2022-01-10 07:09:23,316 INFO L78 Accepts]: Start accepts. Automaton has 54748 states and 72191 transitions. Word has length 80 [2022-01-10 07:09:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 54748 states and 72191 transitions. [2022-01-10 07:09:23,316 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 07:09:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54748 states and 72191 transitions. [2022-01-10 07:09:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:09:23,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:23,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:23,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:23,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:23,522 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1352186889, now seen corresponding path program 1 times [2022-01-10 07:09:23,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:23,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667756671] [2022-01-10 07:09:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:23,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:23,523 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:23,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:09:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:09:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:23,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:09:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:23,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667756671] [2022-01-10 07:09:23,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667756671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:09:23,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:09:23,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:09:23,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15317723] [2022-01-10 07:09:23,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:09:23,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:09:23,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:09:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:09:23,906 INFO L87 Difference]: Start difference. First operand 54748 states and 72191 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 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 07:09:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:29,356 INFO L93 Difference]: Finished difference Result 133720 states and 175240 transitions. [2022-01-10 07:09:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 07:09:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 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 81 [2022-01-10 07:09:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:29,467 INFO L225 Difference]: With dead ends: 133720 [2022-01-10 07:09:29,467 INFO L226 Difference]: Without dead ends: 79351 [2022-01-10 07:09:29,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:09:29,512 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1238 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:29,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 328 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:09:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79351 states. [2022-01-10 07:09:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79351 to 61567. [2022-01-10 07:09:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61567 states, 61566 states have (on average 1.2899652405548516) internal successors, (79418), 61566 states have internal predecessors, (79418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61567 states to 61567 states and 79418 transitions. [2022-01-10 07:09:34,062 INFO L78 Accepts]: Start accepts. Automaton has 61567 states and 79418 transitions. Word has length 81 [2022-01-10 07:09:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:34,062 INFO L470 AbstractCegarLoop]: Abstraction has 61567 states and 79418 transitions. [2022-01-10 07:09:34,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 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 07:09:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 61567 states and 79418 transitions. [2022-01-10 07:09:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:09:34,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:34,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:34,074 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 07:09:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:34,268 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash 36133450, now seen corresponding path program 1 times [2022-01-10 07:09:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:34,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459392789] [2022-01-10 07:09:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:34,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:34,271 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:34,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:09:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:09:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:34,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:09:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:34,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459392789] [2022-01-10 07:09:34,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459392789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:09:34,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:09:34,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:09:34,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923887977] [2022-01-10 07:09:34,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:09:34,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:09:34,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:09:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:09:34,670 INFO L87 Difference]: Start difference. First operand 61567 states and 79418 transitions. Second operand has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 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 07:09:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:09:43,017 INFO L93 Difference]: Finished difference Result 177797 states and 228956 transitions. [2022-01-10 07:09:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:09:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 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 81 [2022-01-10 07:09:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:09:43,216 INFO L225 Difference]: With dead ends: 177797 [2022-01-10 07:09:43,216 INFO L226 Difference]: Without dead ends: 116522 [2022-01-10 07:09:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:09:43,284 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1097 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:09:43,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 407 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:09:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116522 states.