/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/reducercommutativity/avg05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:44:18,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:44:18,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:44:18,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:44:18,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:44:18,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:44:18,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:44:18,087 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 03:44:18,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:44:18,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:44:18,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:44:18,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:44:18,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:44:18,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:44:18,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:44:18,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:44:18,105 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:44:18,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:44:18,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:44:18,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:44:18,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:44:18,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:44:18,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:44:18,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:44:18,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:44:18,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:44:18,109 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:44:18,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:44:18,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:44:18,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:44:18,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:44:18,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:44:18,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:44:18,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:44:18,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:44:18,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:44:18,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:44:18,336 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:44:18,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i [2022-01-10 03:44:18,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f07085a/818965ecb4014600b292aee761e0f497/FLAGc63a95ed4 [2022-01-10 03:44:18,791 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:44:18,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i [2022-01-10 03:44:18,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f07085a/818965ecb4014600b292aee761e0f497/FLAGc63a95ed4 [2022-01-10 03:44:18,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f07085a/818965ecb4014600b292aee761e0f497 [2022-01-10 03:44:18,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:44:18,812 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:44:18,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:44:18,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:44:18,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:44:18,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:44:18" (1/1) ... [2022-01-10 03:44:18,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c26e444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:18, skipping insertion in model container [2022-01-10 03:44:18,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:44:18" (1/1) ... [2022-01-10 03:44:18,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:44:18,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:44:18,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i[1275,1288] [2022-01-10 03:44:18,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:44:19,003 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:44:19,020 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i[1275,1288] [2022-01-10 03:44:19,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:44:19,029 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:44:19,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19 WrapperNode [2022-01-10 03:44:19,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:44:19,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:44:19,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:44:19,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:44:19,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,061 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2022-01-10 03:44:19,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:44:19,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:44:19,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:44:19,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:44:19,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:44:19,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:44:19,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:44:19,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:44:19,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (1/1) ... [2022-01-10 03:44:19,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:44:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:44:19,126 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 03:44:19,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:44:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:44:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:44:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:44:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-01-10 03:44:19,154 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-01-10 03:44:19,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:44:19,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:44:19,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:44:19,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:44:19,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:44:19,199 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:44:19,200 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:44:19,385 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:44:19,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:44:19,390 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:44:19,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:44:19 BoogieIcfgContainer [2022-01-10 03:44:19,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:44:19,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:44:19,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:44:19,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:44:19,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:44:18" (1/3) ... [2022-01-10 03:44:19,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640e5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:44:19, skipping insertion in model container [2022-01-10 03:44:19,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:44:19" (2/3) ... [2022-01-10 03:44:19,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640e5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:44:19, skipping insertion in model container [2022-01-10 03:44:19,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:44:19" (3/3) ... [2022-01-10 03:44:19,431 INFO L111 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2022-01-10 03:44:19,435 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:44:19,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:44:19,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:44:19,491 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 03:44:19,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:44:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:44:19,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:19,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:19,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-01-10 03:44:19,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:19,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308068213] [2022-01-10 03:44:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:44:19,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:19,549 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 03:44:19,550 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 03:44:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:44:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:44:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:44:19,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:44:19,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308068213] [2022-01-10 03:44:19,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308068213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:44:19,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:44:19,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:44:19,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320564305] [2022-01-10 03:44:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:44:19,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:44:19,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:44:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:44:19,933 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:44:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:19,971 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-10 03:44:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:44:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-10 03:44:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:19,984 INFO L225 Difference]: With dead ends: 50 [2022-01-10 03:44:19,985 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 03:44:19,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 03:44:19,991 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:19,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 03:44:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-10 03:44:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-10 03:44:20,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-01-10 03:44:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:20,023 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-10 03:44:20,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:44:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-10 03:44:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 03:44:20,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:20,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:20,037 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 03:44:20,236 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 03:44:20,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-01-10 03:44:20,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:20,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900176458] [2022-01-10 03:44:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:44:20,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:20,252 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 03:44:20,253 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 03:44:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:44:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:44:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:44:20,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:44:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:44:20,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900176458] [2022-01-10 03:44:20,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900176458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:44:20,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:44:20,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:44:20,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093021467] [2022-01-10 03:44:20,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:44:20,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:44:20,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:44:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:44:20,571 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:44:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:20,611 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-01-10 03:44:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:44:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-01-10 03:44:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:20,612 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:44:20,612 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 03:44:20,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 03:44:20,613 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:20,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 03:44:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 03:44:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 03:44:20,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 30 [2022-01-10 03:44:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 03:44:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:44:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 03:44:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 03:44:20,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:20,619 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:20,633 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 03:44:20,830 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 03:44:20,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1158408835, now seen corresponding path program 2 times [2022-01-10 03:44:20,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:20,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041879877] [2022-01-10 03:44:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:44:20,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:20,835 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 03:44:20,837 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 03:44:20,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:44:20,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:44:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:44:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:44:20,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:44:20,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041879877] [2022-01-10 03:44:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041879877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:44:20,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:44:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:44:20,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354313628] [2022-01-10 03:44:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:44:20,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:44:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:44:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:44:20,985 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:44:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:20,999 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-10 03:44:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:44:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-01-10 03:44:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:21,001 INFO L225 Difference]: With dead ends: 48 [2022-01-10 03:44:21,001 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:44:21,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 03:44:21,002 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:21,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:44:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-10 03:44:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-10 03:44:21,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 36 [2022-01-10 03:44:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:21,006 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-10 03:44:21,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:44:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-10 03:44:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 03:44:21,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:21,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:21,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 03:44:21,215 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 03:44:21,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1754402689, now seen corresponding path program 1 times [2022-01-10 03:44:21,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:21,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128548665] [2022-01-10 03:44:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:44:21,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:21,219 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 03:44:21,221 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 03:44:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:44:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:44:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:44:21,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:44:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:44:21,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128548665] [2022-01-10 03:44:21,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128548665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:44:21,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:44:21,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:44:21,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357864706] [2022-01-10 03:44:21,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:44:21,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:44:21,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:44:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:44:21,704 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:44:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:21,767 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-01-10 03:44:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 03:44:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2022-01-10 03:44:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:21,768 INFO L225 Difference]: With dead ends: 52 [2022-01-10 03:44:21,768 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:44:21,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:44:21,769 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:21,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 178 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:44:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:44:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-10 03:44:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-10 03:44:21,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 42 [2022-01-10 03:44:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-10 03:44:21,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:44:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-10 03:44:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 03:44:21,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:21,776 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:21,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:44:21,990 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 03:44:21,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash 864519171, now seen corresponding path program 2 times [2022-01-10 03:44:21,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:21,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156049240] [2022-01-10 03:44:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:44:21,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:21,994 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 03:44:21,995 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 03:44:22,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:44:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:44:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:44:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 03:44:22,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:44:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 03:44:22,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:22,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156049240] [2022-01-10 03:44:22,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156049240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:44:22,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:44:22,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:44:22,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55333586] [2022-01-10 03:44:22,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:44:22,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:44:22,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:44:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:44:22,353 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:44:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:22,389 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-01-10 03:44:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:44:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-01-10 03:44:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:22,390 INFO L225 Difference]: With dead ends: 56 [2022-01-10 03:44:22,390 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 03:44:22,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 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 03:44:22,391 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:22,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 03:44:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 03:44:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-10 03:44:22,395 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 44 [2022-01-10 03:44:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:22,395 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-10 03:44:22,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:44:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-10 03:44:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 03:44:22,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:22,396 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:22,412 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 03:44:22,610 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 03:44:22,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash -225947779, now seen corresponding path program 3 times [2022-01-10 03:44:22,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322080107] [2022-01-10 03:44:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:44:22,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:22,612 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 03:44:22,614 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 03:44:22,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:44:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:44:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:44:22,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-01-10 03:44:22,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:44:22,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:22,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322080107] [2022-01-10 03:44:22,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322080107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:44:22,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:44:22,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:44:22,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828860130] [2022-01-10 03:44:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:44:22,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:44:22,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:44:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:44:22,864 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:44:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:22,880 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-01-10 03:44:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:44:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-01-10 03:44:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:22,881 INFO L225 Difference]: With dead ends: 59 [2022-01-10 03:44:22,881 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 03:44:22,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 03:44:22,882 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 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 03:44:22,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 03:44:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-10 03:44:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-10 03:44:22,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 62 [2022-01-10 03:44:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:22,887 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-10 03:44:22,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:44:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-10 03:44:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 03:44:22,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:22,888 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:22,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:44:23,099 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 03:44:23,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1082872347, now seen corresponding path program 1 times [2022-01-10 03:44:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104521412] [2022-01-10 03:44:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:44:23,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:23,102 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 03:44:23,103 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 03:44:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:44:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:44:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 84 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-10 03:44:23,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:44:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 03:44:23,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104521412] [2022-01-10 03:44:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104521412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:44:23,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:44:23,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:44:23,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209165976] [2022-01-10 03:44:23,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:44:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:44:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:44:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:44:23,559 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:44:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:23,630 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-01-10 03:44:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 03:44:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-01-10 03:44:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:23,631 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:44:23,631 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:44:23,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:44:23,632 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:23,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 222 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:44:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:44:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-10 03:44:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-10 03:44:23,636 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 64 [2022-01-10 03:44:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:23,636 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-10 03:44:23,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:44:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-10 03:44:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 03:44:23,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:23,637 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:23,653 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 03:44:23,851 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 03:44:23,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash -169049063, now seen corresponding path program 2 times [2022-01-10 03:44:23,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059857633] [2022-01-10 03:44:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:44:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:23,855 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 03:44:23,856 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 03:44:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:44:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:44:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:44:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:44:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 130 proven. 1 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-01-10 03:44:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:44:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-01-10 03:44:24,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:44:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059857633] [2022-01-10 03:44:24,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059857633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:44:24,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:44:24,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:44:24,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134122121] [2022-01-10 03:44:24,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:44:24,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:44:24,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:44:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:44:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:44:24,385 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:44:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:44:24,440 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-01-10 03:44:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:44:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2022-01-10 03:44:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:44:24,443 INFO L225 Difference]: With dead ends: 68 [2022-01-10 03:44:24,444 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 03:44:24,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 03:44:24,445 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:44:24,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:44:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 03:44:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-10 03:44:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:44:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-01-10 03:44:24,449 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 70 [2022-01-10 03:44:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:44:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-01-10 03:44:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:44:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-01-10 03:44:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 03:44:24,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:44:24,451 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:44:24,477 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 03:44:24,672 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 03:44:24,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:44:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:44:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 319930483, now seen corresponding path program 3 times [2022-01-10 03:44:24,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:44:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542461463] [2022-01-10 03:44:24,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:44:24,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:44:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:44:24,679 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 03:44:24,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process