/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/combinations/gcd_2+newton_2_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:54:27,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:54:27,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:54:27,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 07:54:27,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:54:27,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:54:27,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:54:27,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:54:27,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:54:27,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:54:27,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:54:27,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:54:27,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:54:27,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:54:27,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:54:27,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:54:27,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:54:27,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:54:27,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:54:27,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:54:27,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 07:54:27,750 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:54:27,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:54:27,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:54:27,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:54:27,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:54:27,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:54:27,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:54:27,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:54:27,752 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:54:27,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:54:27,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:54:27,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:54:27,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:54:27,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:54:27,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:54:27,755 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:54:27,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:54:27,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:54:27,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:54:27,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:54:27,905 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:54:27,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i [2022-01-10 07:54:27,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99a0607/333b8d69402e421ebe6f4751b5eb19fd/FLAG443c2a5a7 [2022-01-10 07:54:28,337 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:54:28,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i [2022-01-10 07:54:28,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99a0607/333b8d69402e421ebe6f4751b5eb19fd/FLAG443c2a5a7 [2022-01-10 07:54:28,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99a0607/333b8d69402e421ebe6f4751b5eb19fd [2022-01-10 07:54:28,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:54:28,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:54:28,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:54:28,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:54:28,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:54:28,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:54:28" (1/1) ... [2022-01-10 07:54:28,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c5b303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:28, skipping insertion in model container [2022-01-10 07:54:28,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:54:28" (1/1) ... [2022-01-10 07:54:28,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:54:28,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:54:28,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i[1226,1239] [2022-01-10 07:54:28,994 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i[2841,2854] [2022-01-10 07:54:28,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:54:29,004 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:54:29,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i[1226,1239] [2022-01-10 07:54:29,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_2+newton_2_3.i[2841,2854] [2022-01-10 07:54:29,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:54:29,049 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:54:29,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29 WrapperNode [2022-01-10 07:54:29,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:54:29,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:54:29,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:54:29,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:54:29,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,130 INFO L137 Inliner]: procedures = 28, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 72 [2022-01-10 07:54:29,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:54:29,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:54:29,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:54:29,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:54:29,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:54:29,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:54:29,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:54:29,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:54:29,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (1/1) ... [2022-01-10 07:54:29,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:54:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:54:29,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 07:54:29,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 07:54:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:54:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:54:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-01-10 07:54:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-01-10 07:54:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-01-10 07:54:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-01-10 07:54:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:54:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:54:29,313 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:54:29,314 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:54:29,445 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:54:29,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:54:29,449 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 07:54:29,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:54:29 BoogieIcfgContainer [2022-01-10 07:54:29,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:54:29,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:54:29,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:54:29,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:54:29,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:54:28" (1/3) ... [2022-01-10 07:54:29,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5b10d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:54:29, skipping insertion in model container [2022-01-10 07:54:29,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:54:29" (2/3) ... [2022-01-10 07:54:29,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5b10d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:54:29, skipping insertion in model container [2022-01-10 07:54:29,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:54:29" (3/3) ... [2022-01-10 07:54:29,473 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_3.i [2022-01-10 07:54:29,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:54:29,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 07:54:29,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:54:29,539 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 07:54:29,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 07:54:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 07:54:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 07:54:29,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:54:29,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:54:29,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:54:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:54:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-01-10 07:54:29,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:54:29,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456158952] [2022-01-10 07:54:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:54:29,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:54:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:54:29,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:54:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 07:54:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:54:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:54:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:54:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:54:29,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:54:29,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:54:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456158952] [2022-01-10 07:54:29,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456158952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:54:29,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:54:29,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:54:29,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835690200] [2022-01-10 07:54:29,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:54:29,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:54:29,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:54:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:54:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:54:29,794 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:54:29,808 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-01-10 07:54:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:54:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-01-10 07:54:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:54:29,814 INFO L225 Difference]: With dead ends: 68 [2022-01-10 07:54:29,814 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 07:54:29,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:54:29,818 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:54:29,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-01-10 07:54:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 07:54:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 07:54:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 07:54:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-10 07:54:29,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-01-10 07:54:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:54:29,842 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-10 07:54:29,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-10 07:54:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 07:54:29,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:54:29,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:54:29,849 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 07:54:30,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:54:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:54:30,050 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-01-10 07:54:30,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:54:30,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629415731] [2022-01-10 07:54:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:54:30,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:54:30,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:54:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 07:54:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:54:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:54:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:54:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:54:30,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:54:30,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:54:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629415731] [2022-01-10 07:54:30,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629415731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:54:30,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:54:30,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:54:30,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073901667] [2022-01-10 07:54:30,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:54:30,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:54:30,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:54:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:54:30,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:54:30,174 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:54:30,226 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-10 07:54:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:54:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-01-10 07:54:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:54:30,227 INFO L225 Difference]: With dead ends: 37 [2022-01-10 07:54:30,227 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 07:54:30,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:54:30,229 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:54:30,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:54:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 07:54:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-10 07:54:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 07:54:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-10 07:54:30,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-01-10 07:54:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:54:30,233 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-10 07:54:30,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-10 07:54:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 07:54:30,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:54:30,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:54:30,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 07:54:30,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:54:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:54:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash 149955676, now seen corresponding path program 1 times [2022-01-10 07:54:30,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:54:30,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095411439] [2022-01-10 07:54:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:54:30,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:54:30,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:54:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 07:54:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:54:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:54:30,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:54:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 07:54:30,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:54:30,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:54:30,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095411439] [2022-01-10 07:54:30,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095411439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:54:30,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:54:30,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:54:30,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148496518] [2022-01-10 07:54:30,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:54:30,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:54:30,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:54:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:54:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:54:30,545 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:54:30,580 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-01-10 07:54:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:54:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 07:54:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:54:30,581 INFO L225 Difference]: With dead ends: 38 [2022-01-10 07:54:30,581 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 07:54:30,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:54:30,582 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:54:30,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:54:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 07:54:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 07:54:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 07:54:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-10 07:54:30,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 12 [2022-01-10 07:54:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:54:30,587 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-10 07:54:30,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-10 07:54:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 07:54:30,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:54:30,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:54:30,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 07:54:30,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,793 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:54:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:54:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-01-10 07:54:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:54:30,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878618304] [2022-01-10 07:54:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:54:30,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:54:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:54:30,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:54:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 07:54:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:54:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 07:54:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:54:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:54:31,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:54:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:54:31,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:54:31,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878618304] [2022-01-10 07:54:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878618304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:54:31,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:54:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 07:54:31,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190950805] [2022-01-10 07:54:31,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:54:31,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 07:54:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:54:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 07:54:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-10 07:54:31,113 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:54:31,811 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-01-10 07:54:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:54:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 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 12 [2022-01-10 07:54:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:54:31,812 INFO L225 Difference]: With dead ends: 47 [2022-01-10 07:54:31,812 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 07:54:31,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-10 07:54:31,814 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 07:54:31,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 174 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 07:54:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 07:54:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 07:54:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 07:54:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-10 07:54:31,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2022-01-10 07:54:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:54:31,818 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-10 07:54:31,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:54:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-10 07:54:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 07:54:31,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:54:31,818 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:54:31,827 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 07:54:32,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:54:32,025 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:54:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:54:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2084161321, now seen corresponding path program 2 times [2022-01-10 07:54:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:54:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623997319] [2022-01-10 07:54:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 07:54:32,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:54:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:54:32,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:54:32,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 07:54:33,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 07:54:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 07:54:33,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 07:54:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:55:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:55:30,101 INFO L328 TraceCheckSpWp]: Computing backward predicates...