/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/array-cav19/array_init_pair_symmetr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:00:12,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:00:12,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:00:12,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 04:00:12,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:00:12,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:00:12,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:00:12,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:00:12,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:00:12,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:00:12,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:00:12,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:00:12,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:00:12,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:00:12,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:00:12,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:00:12,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:00:12,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:00:12,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:00:12,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:00:12,585 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 04:00:12,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:00:12,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:00:12,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:00:12,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:00:12,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:00:12,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:00:12,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:00:12,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:00:12,610 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:00:12,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:00:12,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:00:12,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:00:12,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:00:12,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:00:12,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:00:12,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:00:12,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:00:12,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:00:12,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:00:12,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:00:12,878 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:00:12,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_pair_symmetr2.c [2022-01-10 04:00:12,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a0ff88a/20b3324a86144a27ab98aae995b424fe/FLAG160af0ae1 [2022-01-10 04:00:13,332 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:00:13,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_pair_symmetr2.c [2022-01-10 04:00:13,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a0ff88a/20b3324a86144a27ab98aae995b424fe/FLAG160af0ae1 [2022-01-10 04:00:13,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a0ff88a/20b3324a86144a27ab98aae995b424fe [2022-01-10 04:00:13,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:00:13,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:00:13,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:00:13,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:00:13,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:00:13,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc081b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13, skipping insertion in model container [2022-01-10 04:00:13,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:00:13,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:00:13,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-01-10 04:00:13,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:00:13,557 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:00:13,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-01-10 04:00:13,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:00:13,637 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:00:13,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13 WrapperNode [2022-01-10 04:00:13,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:00:13,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:00:13,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:00:13,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:00:13,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,677 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-01-10 04:00:13,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:00:13,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:00:13,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:00:13,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:00:13,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:00:13,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:00:13,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:00:13,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:00:13,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (1/1) ... [2022-01-10 04:00:13,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:00:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:00:13,740 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 04:00:13,761 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 04:00:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:00:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:00:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 04:00:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 04:00:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 04:00:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 04:00:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:00:13,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:00:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 04:00:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 04:00:13,849 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:00:13,851 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:00:14,069 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:00:14,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:00:14,073 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 04:00:14,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:00:14 BoogieIcfgContainer [2022-01-10 04:00:14,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:00:14,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:00:14,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:00:14,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:00:14,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:00:13" (1/3) ... [2022-01-10 04:00:14,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d49b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:00:14, skipping insertion in model container [2022-01-10 04:00:14,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:00:13" (2/3) ... [2022-01-10 04:00:14,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d49b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:00:14, skipping insertion in model container [2022-01-10 04:00:14,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:00:14" (3/3) ... [2022-01-10 04:00:14,080 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-01-10 04:00:14,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:00:14,084 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:00:14,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:00:14,150 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 04:00:14,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:00:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 04:00:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 04:00:14,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:14,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:14,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1607472667, now seen corresponding path program 1 times [2022-01-10 04:00:14,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:14,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766186948] [2022-01-10 04:00:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:00:14,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:14,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:14,211 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 04:00:14,233 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 04:00:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:00:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:00:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:14,306 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 04:00:14,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:00:14,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766186948] [2022-01-10 04:00:14,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766186948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:00:14,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:00:14,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:00:14,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026273408] [2022-01-10 04:00:14,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:00:14,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:00:14,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:00:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:00:14,340 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 04:00:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:14,356 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-01-10 04:00:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:00:14,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-01-10 04:00:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:14,362 INFO L225 Difference]: With dead ends: 50 [2022-01-10 04:00:14,363 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 04:00:14,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:00:14,368 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:14,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:00:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 04:00:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 04:00:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 04:00:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-10 04:00:14,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2022-01-10 04:00:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:14,400 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-10 04:00:14,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 04:00:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-10 04:00:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 04:00:14,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:14,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:14,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 04:00:14,608 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 04:00:14,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1898116011, now seen corresponding path program 1 times [2022-01-10 04:00:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716710290] [2022-01-10 04:00:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:00:14,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:14,615 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 04:00:14,621 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 04:00:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:00:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:00:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:14,723 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 04:00:14,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:00:14,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716710290] [2022-01-10 04:00:14,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716710290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:00:14,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:00:14,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:00:14,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360752045] [2022-01-10 04:00:14,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:00:14,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:00:14,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:00:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:00:14,726 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 04:00:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:14,801 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-01-10 04:00:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:00:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-01-10 04:00:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:14,803 INFO L225 Difference]: With dead ends: 40 [2022-01-10 04:00:14,803 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 04:00:14,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:00:14,804 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:14,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 04:00:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 04:00:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-01-10 04:00:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 04:00:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-10 04:00:14,822 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-01-10 04:00:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-10 04:00:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 04:00:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-10 04:00:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 04:00:14,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:14,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:14,830 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 04:00:15,033 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 04:00:15,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash 544146986, now seen corresponding path program 1 times [2022-01-10 04:00:15,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:15,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092152480] [2022-01-10 04:00:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:00:15,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:15,041 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 04:00:15,042 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 04:00:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:00:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 04:00:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 04:00:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 04:00:15,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:15,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092152480] [2022-01-10 04:00:15,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092152480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:15,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:15,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-10 04:00:15,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125865444] [2022-01-10 04:00:15,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:15,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 04:00:15,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 04:00:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 04:00:15,415 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 04:00:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:15,674 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-01-10 04:00:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 04:00:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2022-01-10 04:00:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:15,676 INFO L225 Difference]: With dead ends: 72 [2022-01-10 04:00:15,676 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 04:00:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-10 04:00:15,677 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:15,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 37 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 04:00:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 04:00:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2022-01-10 04:00:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-10 04:00:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-01-10 04:00:15,692 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 29 [2022-01-10 04:00:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:15,692 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-01-10 04:00:15,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 04:00:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-01-10 04:00:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 04:00:15,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:15,696 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:15,720 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 04:00:15,903 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 04:00:15,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1645511465, now seen corresponding path program 2 times [2022-01-10 04:00:15,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:15,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969048640] [2022-01-10 04:00:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:00:15,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:15,907 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 04:00:15,933 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 04:00:16,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:00:16,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:00:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 04:00:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-01-10 04:00:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-01-10 04:00:16,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969048640] [2022-01-10 04:00:16,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969048640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:16,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:16,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-01-10 04:00:16,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305709291] [2022-01-10 04:00:16,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:16,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:00:16,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:00:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:00:16,651 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-10 04:00:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:17,414 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2022-01-10 04:00:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 04:00:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 89 [2022-01-10 04:00:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:17,416 INFO L225 Difference]: With dead ends: 162 [2022-01-10 04:00:17,416 INFO L226 Difference]: Without dead ends: 145 [2022-01-10 04:00:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-01-10 04:00:17,417 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 352 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:17,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 132 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 04:00:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-10 04:00:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2022-01-10 04:00:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-10 04:00:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2022-01-10 04:00:17,435 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 89 [2022-01-10 04:00:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:17,436 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2022-01-10 04:00:17,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-10 04:00:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2022-01-10 04:00:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-10 04:00:17,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:17,438 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:17,453 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 04:00:17,638 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 04:00:17,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 548463335, now seen corresponding path program 3 times [2022-01-10 04:00:17,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:17,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056462387] [2022-01-10 04:00:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 04:00:17,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:17,643 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 04:00:17,647 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 04:00:18,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-10 04:00:18,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:00:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 04:00:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2022-01-10 04:00:18,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2022-01-10 04:00:19,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056462387] [2022-01-10 04:00:19,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056462387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:19,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:19,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2022-01-10 04:00:19,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964233448] [2022-01-10 04:00:19,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:19,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 04:00:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 04:00:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2022-01-10 04:00:19,649 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 04:00:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:23,103 INFO L93 Difference]: Finished difference Result 342 states and 434 transitions. [2022-01-10 04:00:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 04:00:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 209 [2022-01-10 04:00:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:23,106 INFO L225 Difference]: With dead ends: 342 [2022-01-10 04:00:23,106 INFO L226 Difference]: Without dead ends: 313 [2022-01-10 04:00:23,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=529, Invalid=953, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 04:00:23,107 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1027 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:23,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 552 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 04:00:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-10 04:00:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 192. [2022-01-10 04:00:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-10 04:00:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 259 transitions. [2022-01-10 04:00:23,143 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 259 transitions. Word has length 209 [2022-01-10 04:00:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:23,145 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 259 transitions. [2022-01-10 04:00:23,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 04:00:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 259 transitions. [2022-01-10 04:00:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-01-10 04:00:23,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:23,152 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:23,168 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 04:00:23,366 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 04:00:23,367 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1915094685, now seen corresponding path program 4 times [2022-01-10 04:00:23,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951434367] [2022-01-10 04:00:23,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 04:00:23,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:23,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:23,388 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 04:00:23,433 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 04:00:23,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 04:00:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:00:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 04:00:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10472 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9064 trivial. 0 not checked. [2022-01-10 04:00:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10472 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9064 trivial. 0 not checked. [2022-01-10 04:00:26,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951434367] [2022-01-10 04:00:26,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951434367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:26,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:26,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-01-10 04:00:26,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779049253] [2022-01-10 04:00:26,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:26,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-10 04:00:26,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:26,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-10 04:00:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 04:00:26,994 INFO L87 Difference]: Start difference. First operand 192 states and 259 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 44 states have call successors, (132), 2 states have call predecessors, (132), 2 states have return successors, (132), 44 states have call predecessors, (132), 44 states have call successors, (132) [2022-01-10 04:00:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:39,929 INFO L93 Difference]: Finished difference Result 702 states and 890 transitions. [2022-01-10 04:00:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 04:00:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 44 states have call successors, (132), 2 states have call predecessors, (132), 2 states have return successors, (132), 44 states have call predecessors, (132), 44 states have call successors, (132) Word has length 449 [2022-01-10 04:00:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:39,934 INFO L225 Difference]: With dead ends: 702 [2022-01-10 04:00:39,934 INFO L226 Difference]: Without dead ends: 649 [2022-01-10 04:00:39,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2022-01-10 04:00:39,937 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 4646 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 2065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4649 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 10292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2065 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:39,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4649 Valid, 2259 Invalid, 10292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2065 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-01-10 04:00:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-10 04:00:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 384. [2022-01-10 04:00:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-01-10 04:00:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 523 transitions. [2022-01-10 04:00:39,990 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 523 transitions. Word has length 449 [2022-01-10 04:00:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:39,991 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 523 transitions. [2022-01-10 04:00:39,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 44 states have call successors, (132), 2 states have call predecessors, (132), 2 states have return successors, (132), 44 states have call predecessors, (132), 44 states have call successors, (132) [2022-01-10 04:00:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 523 transitions. [2022-01-10 04:00:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2022-01-10 04:00:40,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:40,008 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:40,031 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 04:00:40,225 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 04:00:40,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 744718939, now seen corresponding path program 5 times [2022-01-10 04:00:40,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016795777] [2022-01-10 04:00:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 04:00:40,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:40,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:40,236 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 04:00:40,237 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 04:01:06,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2022-01-10 04:01:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:01:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 04:01:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:01:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46184 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 39928 trivial. 0 not checked. [2022-01-10 04:01:09,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:01:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46184 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 39928 trivial. 0 not checked. [2022-01-10 04:01:16,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:01:16,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016795777] [2022-01-10 04:01:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016795777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:01:16,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:01:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51] total 99 [2022-01-10 04:01:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983427451] [2022-01-10 04:01:16,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:01:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-10 04:01:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:01:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-10 04:01:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2547, Invalid=7155, Unknown=0, NotChecked=0, Total=9702 [2022-01-10 04:01:16,734 INFO L87 Difference]: Start difference. First operand 384 states and 523 transitions. Second operand has 99 states, 99 states have (on average 2.98989898989899) internal successors, (296), 99 states have internal predecessors, (296), 92 states have call successors, (276), 2 states have call predecessors, (276), 2 states have return successors, (276), 92 states have call predecessors, (276), 92 states have call successors, (276)