/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-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:53:07,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:53:07,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:53:07,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:53:07,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:53:07,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:53:07,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:53:07,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:53:07,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:53:07,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:53:07,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:53:07,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:53:07,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:53:07,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:53:07,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:53:07,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:53:07,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:53:07,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:53:07,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:53:07,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:53:07,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:53:07,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:53:07,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:53:07,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:53:07,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:53:07,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:53:07,303 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:53:07,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:53:07,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:53:07,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:53:07,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:53:07,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:53:07,305 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:53:07,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:53:07,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:53:07,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:53:07,306 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:53:07,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:53:07,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:53:07,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:53:07,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:53:07,527 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:53:07,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2022-01-10 03:53:07,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68810588a/b555573d95264724abcd8db4a3cf9a52/FLAGbd26fd88a [2022-01-10 03:53:07,855 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:53:07,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c [2022-01-10 03:53:07,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68810588a/b555573d95264724abcd8db4a3cf9a52/FLAGbd26fd88a [2022-01-10 03:53:08,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68810588a/b555573d95264724abcd8db4a3cf9a52 [2022-01-10 03:53:08,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:53:08,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:53:08,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:53:08,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:53:08,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:53:08,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609c3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08, skipping insertion in model container [2022-01-10 03:53:08,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:53:08,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:53:08,498 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-crafted/zero_sum2.c[400,413] [2022-01-10 03:53:08,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:53:08,530 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:53:08,538 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-crafted/zero_sum2.c[400,413] [2022-01-10 03:53:08,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:53:08,556 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:53:08,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08 WrapperNode [2022-01-10 03:53:08,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:53:08,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:53:08,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:53:08,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:53:08,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,592 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-01-10 03:53:08,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:53:08,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:53:08,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:53:08,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:53:08,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:53:08,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:53:08,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:53:08,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:53:08,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (1/1) ... [2022-01-10 03:53:08,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:53:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:53:08,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:53:08,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:53:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:53:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:53:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:53:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-01-10 03:53:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:53:08,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:53:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-01-10 03:53:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:53:08,806 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:53:08,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:53:09,012 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:53:09,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:53:09,016 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 03:53:09,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:53:09 BoogieIcfgContainer [2022-01-10 03:53:09,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:53:09,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:53:09,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:53:09,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:53:09,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:53:08" (1/3) ... [2022-01-10 03:53:09,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c773a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:53:09, skipping insertion in model container [2022-01-10 03:53:09,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:53:08" (2/3) ... [2022-01-10 03:53:09,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c773a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:53:09, skipping insertion in model container [2022-01-10 03:53:09,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:53:09" (3/3) ... [2022-01-10 03:53:09,024 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2022-01-10 03:53:09,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:53:09,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:53:09,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:53:09,078 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 03:53:09,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:53:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 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 03:53:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:53:09,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:09,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:09,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-01-10 03:53:09,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:09,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926451] [2022-01-10 03:53:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:09,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:09,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:09,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:09,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:53:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:53:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:09,231 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 03:53:09,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:09,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926451] [2022-01-10 03:53:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:09,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:09,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:53:09,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427128278] [2022-01-10 03:53:09,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:09,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:53:09,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:53:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:53:09,261 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:53:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:09,274 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-01-10 03:53:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:53:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 03:53:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:09,281 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:53:09,281 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 03:53:09,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 03:53:09,286 INFO L933 BasicCegarLoop]: 31 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, 31 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 03:53:09,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:53:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 03:53:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 03:53:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 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 03:53:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-01-10 03:53:09,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-01-10 03:53:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:09,307 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-01-10 03:53:09,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:53:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-01-10 03:53:09,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:53:09,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:09,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:09,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:09,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:09,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-01-10 03:53:09,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:09,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93836160] [2022-01-10 03:53:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:09,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:09,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:09,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:53:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:53:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:09,601 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 03:53:09,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:09,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93836160] [2022-01-10 03:53:09,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93836160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:09,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:53:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523889364] [2022-01-10 03:53:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:09,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:53:09,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:53:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:53:09,604 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:53:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:09,640 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-01-10 03:53:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:53:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 03:53:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:09,641 INFO L225 Difference]: With dead ends: 32 [2022-01-10 03:53:09,641 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 03:53:09,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 03:53:09,642 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:09,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:53:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 03:53:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 03:53:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 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 03:53:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-10 03:53:09,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-10 03:53:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:09,646 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-10 03:53:09,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:53:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-10 03:53:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:53:09,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:09,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:09,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:53:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:09,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1458205426, now seen corresponding path program 1 times [2022-01-10 03:53:09,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656115242] [2022-01-10 03:53:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:09,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:09,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:09,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:09,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:53:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:53:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:09,949 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 03:53:09,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:09,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656115242] [2022-01-10 03:53:09,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656115242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:09,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:09,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:53:09,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552268528] [2022-01-10 03:53:09,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:09,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:53:09,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:53:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:53:09,951 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 03:53:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:09,991 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-01-10 03:53:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:53:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-01-10 03:53:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:09,992 INFO L225 Difference]: With dead ends: 53 [2022-01-10 03:53:09,992 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:53:09,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:53:09,993 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:09,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:53:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:53:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-10 03:53:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 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 03:53:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-10 03:53:09,997 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-01-10 03:53:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-10 03:53:09,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 03:53:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-10 03:53:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:53:09,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:09,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:10,007 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 03:53:10,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:10,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:10,205 INFO L85 PathProgramCache]: Analyzing trace with hash 477186736, now seen corresponding path program 1 times [2022-01-10 03:53:10,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:10,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557240600] [2022-01-10 03:53:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:10,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:10,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:10,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:53:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:53:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:10,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:10,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:10,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557240600] [2022-01-10 03:53:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557240600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:10,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:53:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140701845] [2022-01-10 03:53:10,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:53:10,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:53:10,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:53:10,384 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:53:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:10,462 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-10 03:53:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:53:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 19 [2022-01-10 03:53:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:10,463 INFO L225 Difference]: With dead ends: 55 [2022-01-10 03:53:10,463 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 03:53:10,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:53:10,464 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:10,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:53:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 03:53:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-10 03:53:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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 03:53:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-01-10 03:53:10,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2022-01-10 03:53:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:10,469 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-01-10 03:53:10,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:53:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-01-10 03:53:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 03:53:10,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:10,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:10,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:10,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:10,678 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash 668215250, now seen corresponding path program 2 times [2022-01-10 03:53:10,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:10,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342146460] [2022-01-10 03:53:10,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:53:10,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:10,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:10,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:53:10,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:53:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:53:10,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:53:10,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:53:10,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342146460] [2022-01-10 03:53:10,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342146460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:53:10,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:53:10,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:53:10,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969968398] [2022-01-10 03:53:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:53:10,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:53:10,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:10,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:53:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:53:10,798 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:53:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:10,867 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-01-10 03:53:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:53:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 21 [2022-01-10 03:53:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:10,869 INFO L225 Difference]: With dead ends: 50 [2022-01-10 03:53:10,869 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 03:53:10,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 03:53:10,870 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:10,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:53:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 03:53:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-01-10 03:53:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:53:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-10 03:53:10,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2022-01-10 03:53:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-10 03:53:10,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:53:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-10 03:53:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 03:53:10,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:10,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:10,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:11,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:11,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 1 times [2022-01-10 03:53:11,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815345435] [2022-01-10 03:53:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:53:11,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:11,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:53:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:53:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:53:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:53:11,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:11,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815345435] [2022-01-10 03:53:11,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815345435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:11,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:11,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 03:53:11,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827031096] [2022-01-10 03:53:11,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:11,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:53:11,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:53:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:53:11,499 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 03:53:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:11,825 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-01-10 03:53:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:53:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 27 [2022-01-10 03:53:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:11,826 INFO L225 Difference]: With dead ends: 87 [2022-01-10 03:53:11,826 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 03:53:11,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:53:11,828 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 146 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:11,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 47 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:53:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 03:53:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 36. [2022-01-10 03:53:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 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 03:53:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-10 03:53:11,834 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-01-10 03:53:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:11,834 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-10 03:53:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 03:53:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-10 03:53:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:53:11,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:11,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:11,843 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 03:53:12,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:12,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 2 times [2022-01-10 03:53:12,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:12,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234073119] [2022-01-10 03:53:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:53:12,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:12,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:12,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:12,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:53:12,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:53:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 03:53:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:12,905 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-10 03:53:12,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 30 [2022-01-10 03:53:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:53:12,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:13,872 INFO L353 Elim1Store]: treesize reduction 54, result has 53.0 percent of original size [2022-01-10 03:53:13,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 85 [2022-01-10 03:53:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:53:14,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234073119] [2022-01-10 03:53:14,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234073119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:14,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:14,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-10 03:53:14,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386324236] [2022-01-10 03:53:14,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:14,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:53:14,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:53:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:53:14,971 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:17,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:19,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:21,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:23,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 03:53:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:24,212 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-01-10 03:53:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:53:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-10 03:53:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:24,213 INFO L225 Difference]: With dead ends: 60 [2022-01-10 03:53:24,213 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 03:53:24,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:53:24,214 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:24,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 373 Invalid, 4 Unknown, 0 Unchecked, 9.2s Time] [2022-01-10 03:53:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 03:53:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-01-10 03:53:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:53:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-01-10 03:53:24,221 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2022-01-10 03:53:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:24,221 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-01-10 03:53:24,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-01-10 03:53:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:53:24,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:24,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:24,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:24,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:24,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 3 times [2022-01-10 03:53:24,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138287455] [2022-01-10 03:53:24,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:53:24,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:24,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:24,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:53:24,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 03:53:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:53:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:53:24,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:53:25,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138287455] [2022-01-10 03:53:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138287455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:25,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:25,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-01-10 03:53:25,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323670810] [2022-01-10 03:53:25,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:53:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:53:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:53:25,190 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 03:53:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:25,559 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-01-10 03:53:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:53:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 37 [2022-01-10 03:53:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:25,561 INFO L225 Difference]: With dead ends: 104 [2022-01-10 03:53:25,561 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 03:53:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:53:25,562 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:25,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:53:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 03:53:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-10 03:53:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 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 03:53:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-01-10 03:53:25,571 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 37 [2022-01-10 03:53:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:25,571 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-01-10 03:53:25,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 03:53:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-01-10 03:53:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:53:25,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:25,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:25,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:25,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 4 times [2022-01-10 03:53:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:25,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721340900] [2022-01-10 03:53:25,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:53:25,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:25,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:25,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:53:25,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:53:25,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:53:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 03:53:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 03:53:26,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721340900] [2022-01-10 03:53:26,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721340900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:26,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:26,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 03:53:26,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101130170] [2022-01-10 03:53:26,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:26,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:53:26,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:53:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:53:26,324 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 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 03:53:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:26,852 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-01-10 03:53:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:53:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 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 39 [2022-01-10 03:53:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:26,854 INFO L225 Difference]: With dead ends: 122 [2022-01-10 03:53:26,854 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 03:53:26,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:53:26,856 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:26,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 64 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:53:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 03:53:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 46. [2022-01-10 03:53:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-01-10 03:53:26,861 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-01-10 03:53:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:26,862 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-01-10 03:53:26,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 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 03:53:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-01-10 03:53:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:53:26,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:26,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:26,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 03:53:27,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:27,073 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 5 times [2022-01-10 03:53:27,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:27,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866356355] [2022-01-10 03:53:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:53:27,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:27,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:53:43,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 03:53:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 03:53:43,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:43,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 03:53:43,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 03:53:43,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 03:53:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:53:45,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 03:53:45,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 35 [2022-01-10 03:53:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:53:45,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:53:50,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866356355] [2022-01-10 03:53:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866356355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:50,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:50,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2022-01-10 03:53:50,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685082387] [2022-01-10 03:53:50,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:50,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 03:53:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 03:53:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=899, Unknown=1, NotChecked=0, Total=992 [2022-01-10 03:53:50,919 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 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 03:53:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:54,699 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-01-10 03:53:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:53:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 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 45 [2022-01-10 03:53:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:54,700 INFO L225 Difference]: With dead ends: 77 [2022-01-10 03:53:54,700 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 03:53:54,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=103, Invalid=1018, Unknown=1, NotChecked=0, Total=1122 [2022-01-10 03:53:54,701 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:54,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 138 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 809 Invalid, 0 Unknown, 28 Unchecked, 3.4s Time] [2022-01-10 03:53:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 03:53:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-01-10 03:53:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-01-10 03:53:54,709 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-01-10 03:53:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:54,709 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-01-10 03:53:54,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 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 03:53:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-01-10 03:53:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:53:54,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:54,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:54,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:54,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:54,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 6 times [2022-01-10 03:53:54,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:54,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580625957] [2022-01-10 03:53:54,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:53:54,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:54,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:54,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:53:55,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-10 03:53:55,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:53:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 03:53:55,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 03:53:55,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:55,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580625957] [2022-01-10 03:53:55,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580625957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:55,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:55,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-01-10 03:53:55,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414310722] [2022-01-10 03:53:55,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:55,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:53:55,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:53:55,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:53:55,625 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 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 03:53:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:56,206 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2022-01-10 03:53:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 03:53:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 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 47 [2022-01-10 03:53:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:56,207 INFO L225 Difference]: With dead ends: 125 [2022-01-10 03:53:56,207 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 03:53:56,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:53:56,208 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:56,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 72 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 03:53:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 03:53:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-01-10 03:53:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-01-10 03:53:56,218 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 47 [2022-01-10 03:53:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-01-10 03:53:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 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 03:53:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-01-10 03:53:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 03:53:56,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:56,220 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:56,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:56,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:56,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash -41974836, now seen corresponding path program 7 times [2022-01-10 03:53:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789439969] [2022-01-10 03:53:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:53:56,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:56,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:56,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:56,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 03:53:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:53:56,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:53:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 03:53:56,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 03:53:57,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:57,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789439969] [2022-01-10 03:53:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789439969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:57,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-10 03:53:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969942442] [2022-01-10 03:53:57,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:53:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:53:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:53:57,045 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:57,492 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-01-10 03:53:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:53:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 03:53:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:57,494 INFO L225 Difference]: With dead ends: 129 [2022-01-10 03:53:57,494 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 03:53:57,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2022-01-10 03:53:57,495 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:57,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:53:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 03:53:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-10 03:53:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-01-10 03:53:57,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2022-01-10 03:53:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:57,503 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-01-10 03:53:57,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-01-10 03:53:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 03:53:57,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:57,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:57,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:57,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:57,712 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2022-01-10 03:53:57,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:57,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242068671] [2022-01-10 03:53:57,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:53:57,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:57,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:57,714 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:57,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 03:53:57,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:53:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:53:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:53:57,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:53:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 03:53:57,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:53:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 03:53:58,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:53:58,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242068671] [2022-01-10 03:53:58,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242068671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:53:58,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:53:58,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-01-10 03:53:58,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45233114] [2022-01-10 03:53:58,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:53:58,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:53:58,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:53:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:53:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:53:58,328 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:53:58,768 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-01-10 03:53:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:53:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-10 03:53:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:53:58,769 INFO L225 Difference]: With dead ends: 81 [2022-01-10 03:53:58,769 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 03:53:58,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:53:58,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:53:58,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 63 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:53:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 03:53:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-01-10 03:53:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:53:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-10 03:53:58,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-01-10 03:53:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:53:58,775 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-10 03:53:58,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:53:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-10 03:53:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 03:53:58,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:53:58,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:53:58,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 03:53:58,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:53:58,976 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:53:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:53:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-01-10 03:53:58,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:53:58,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734302074] [2022-01-10 03:53:58,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:53:58,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:53:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:53:58,979 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:53:58,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process