/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/eca-rers2012/Problem03_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:20:46,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:20:46,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:20:47,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:20:47,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:20:47,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:20:47,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:20:47,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:20:47,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:20:47,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:20:47,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:20:47,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:20:47,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:20:47,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:20:47,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:20:47,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:20:47,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:20:47,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:20:47,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:20:47,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:20:47,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:20:47,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:20:47,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:20:47,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:20:47,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:20:47,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:20:47,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:20:47,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:20:47,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 04:20:47,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:20:47,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:20:47,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:20:47,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:20:47,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:20:47,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:20:47,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:20:47,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:20:47,101 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:20:47,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:20:47,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:20:47,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:20:47,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:20:47,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:20:47,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:20:47,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:20:47,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:20:47,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:20:47,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:20:47,104 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:20:47,105 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:20:47,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:20:47,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:20:47,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:20:47,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:20:47,363 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:20:47,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2022-01-10 04:20:47,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88dc40853/4957a071f5244458aa49fba9e59b1e55/FLAGf4b1395fb [2022-01-10 04:20:47,949 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:20:47,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2022-01-10 04:20:47,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88dc40853/4957a071f5244458aa49fba9e59b1e55/FLAGf4b1395fb [2022-01-10 04:20:48,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88dc40853/4957a071f5244458aa49fba9e59b1e55 [2022-01-10 04:20:48,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:20:48,412 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:20:48,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:20:48,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:20:48,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:20:48,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:20:48" (1/1) ... [2022-01-10 04:20:48,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f3f727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:48, skipping insertion in model container [2022-01-10 04:20:48,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:20:48" (1/1) ... [2022-01-10 04:20:48,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:20:48,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:20:49,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21.c[61500,61513] [2022-01-10 04:20:49,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:20:49,063 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:20:49,230 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21.c[61500,61513] [2022-01-10 04:20:49,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:20:49,256 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:20:49,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49 WrapperNode [2022-01-10 04:20:49,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:20:49,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:20:49,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:20:49,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:20:49,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,395 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 04:20:49,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:20:49,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:20:49,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:20:49,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:20:49,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:20:49,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:20:49,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:20:49,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:20:49,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (1/1) ... [2022-01-10 04:20:49,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:20:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:20:49,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 04:20:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 04:20:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:20:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:20:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:20:49,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:20:49,770 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:20:49,771 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:20:51,473 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:20:51,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:20:51,483 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 04:20:51,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:20:51 BoogieIcfgContainer [2022-01-10 04:20:51,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:20:51,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:20:51,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:20:51,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:20:51,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:20:48" (1/3) ... [2022-01-10 04:20:51,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495205dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:20:51, skipping insertion in model container [2022-01-10 04:20:51,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:20:49" (2/3) ... [2022-01-10 04:20:51,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495205dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:20:51, skipping insertion in model container [2022-01-10 04:20:51,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:20:51" (3/3) ... [2022-01-10 04:20:51,493 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2022-01-10 04:20:51,498 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:20:51,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:20:51,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:20:51,557 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 04:20:51,558 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:20:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:20:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 04:20:51,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:20:51,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:20:51,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:20:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:20:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash 759114634, now seen corresponding path program 1 times [2022-01-10 04:20:51,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:20:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563367098] [2022-01-10 04:20:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:20:51,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:20:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:20:51,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:20:51,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 04:20:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:20:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 04:20:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:21:05,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:05,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:05,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563367098] [2022-01-10 04:21:05,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563367098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:05,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:05,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 04:21:05,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114628455] [2022-01-10 04:21:05,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 04:21:05,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 04:21:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 04:21:05,702 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 9 states, 9 states have (on average 22.444444444444443) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:09,145 INFO L93 Difference]: Finished difference Result 718 states and 1265 transitions. [2022-01-10 04:21:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 04:21:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.444444444444443) internal successors, (202), 8 states have internal predecessors, (202), 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 202 [2022-01-10 04:21:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:09,159 INFO L225 Difference]: With dead ends: 718 [2022-01-10 04:21:09,159 INFO L226 Difference]: Without dead ends: 352 [2022-01-10 04:21:09,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:21:09,166 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 431 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:09,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 464 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 04:21:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-10 04:21:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-10 04:21:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.4586894586894588) internal successors, (512), 351 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 512 transitions. [2022-01-10 04:21:09,219 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 512 transitions. Word has length 202 [2022-01-10 04:21:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:09,220 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 512 transitions. [2022-01-10 04:21:09,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.444444444444443) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 512 transitions. [2022-01-10 04:21:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-10 04:21:09,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:09,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:09,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 04:21:09,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:09,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -497315723, now seen corresponding path program 1 times [2022-01-10 04:21:09,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:09,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531226383] [2022-01-10 04:21:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:09,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:09,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:09,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:09,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 04:21:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 04:21:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:21:23,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:23,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531226383] [2022-01-10 04:21:23,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531226383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:23,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:23,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 04:21:23,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678458114] [2022-01-10 04:21:23,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:23,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 04:21:23,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 04:21:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 04:21:23,348 INFO L87 Difference]: Start difference. First operand 352 states and 512 transitions. Second operand has 10 states, 10 states have (on average 20.9) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:26,740 INFO L93 Difference]: Finished difference Result 730 states and 1182 transitions. [2022-01-10 04:21:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 04:21:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.9) internal successors, (209), 9 states have internal predecessors, (209), 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 209 [2022-01-10 04:21:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:26,744 INFO L225 Difference]: With dead ends: 730 [2022-01-10 04:21:26,744 INFO L226 Difference]: Without dead ends: 493 [2022-01-10 04:21:26,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-01-10 04:21:26,747 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 394 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2803 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:26,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 375 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2803 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 04:21:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-10 04:21:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2022-01-10 04:21:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.339430894308943) internal successors, (659), 492 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 659 transitions. [2022-01-10 04:21:26,768 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 659 transitions. Word has length 209 [2022-01-10 04:21:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:26,769 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 659 transitions. [2022-01-10 04:21:26,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.9) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 659 transitions. [2022-01-10 04:21:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 04:21:26,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:26,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:26,789 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 04:21:26,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:26,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1827497900, now seen corresponding path program 1 times [2022-01-10 04:21:26,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:26,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448949259] [2022-01-10 04:21:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:26,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:26,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:26,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 04:21:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 04:21:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 04:21:29,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:29,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448949259] [2022-01-10 04:21:29,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448949259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:29,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:29,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 04:21:29,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115249607] [2022-01-10 04:21:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 04:21:29,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 04:21:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:21:29,587 INFO L87 Difference]: Start difference. First operand 493 states and 659 transitions. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:31,487 INFO L93 Difference]: Finished difference Result 1331 states and 2082 transitions. [2022-01-10 04:21:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 04:21:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 4 states have internal predecessors, (212), 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 217 [2022-01-10 04:21:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:31,492 INFO L225 Difference]: With dead ends: 1331 [2022-01-10 04:21:31,493 INFO L226 Difference]: Without dead ends: 1094 [2022-01-10 04:21:31,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:21:31,495 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 960 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:31,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 130 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 04:21:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-10 04:21:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 905. [2022-01-10 04:21:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.3440265486725664) internal successors, (1215), 904 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1215 transitions. [2022-01-10 04:21:31,527 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1215 transitions. Word has length 217 [2022-01-10 04:21:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:31,527 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1215 transitions. [2022-01-10 04:21:31,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1215 transitions. [2022-01-10 04:21:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-10 04:21:31,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:31,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:31,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 04:21:31,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:31,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1367443312, now seen corresponding path program 1 times [2022-01-10 04:21:31,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:31,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906159589] [2022-01-10 04:21:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:31,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:31,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:31,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 04:21:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:21:31,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:21:32,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:32,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906159589] [2022-01-10 04:21:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906159589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:32,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:32,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:21:32,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178753589] [2022-01-10 04:21:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:32,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:21:32,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:21:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:21:32,201 INFO L87 Difference]: Start difference. First operand 905 states and 1215 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:33,340 INFO L93 Difference]: Finished difference Result 1961 states and 2847 transitions. [2022-01-10 04:21:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:21:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 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 230 [2022-01-10 04:21:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:33,345 INFO L225 Difference]: With dead ends: 1961 [2022-01-10 04:21:33,345 INFO L226 Difference]: Without dead ends: 1312 [2022-01-10 04:21:33,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 228 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 04:21:33,348 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 187 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:33,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 278 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 04:21:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-10 04:21:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1108. [2022-01-10 04:21:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 1.3098464317976513) internal successors, (1450), 1107 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1450 transitions. [2022-01-10 04:21:33,373 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1450 transitions. Word has length 230 [2022-01-10 04:21:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:33,374 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1450 transitions. [2022-01-10 04:21:33,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1450 transitions. [2022-01-10 04:21:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-10 04:21:33,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:33,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:33,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:21:33,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:33,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1235824537, now seen corresponding path program 1 times [2022-01-10 04:21:33,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:33,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128785889] [2022-01-10 04:21:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:33,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:33,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:21:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 04:21:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:21:37,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:37,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128785889] [2022-01-10 04:21:37,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128785889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:37,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:37,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:21:37,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876177304] [2022-01-10 04:21:37,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:37,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:21:37,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:21:37,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:21:37,219 INFO L87 Difference]: Start difference. First operand 1108 states and 1450 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:38,699 INFO L93 Difference]: Finished difference Result 3127 states and 4267 transitions. [2022-01-10 04:21:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:21:38,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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 233 [2022-01-10 04:21:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:38,707 INFO L225 Difference]: With dead ends: 3127 [2022-01-10 04:21:38,707 INFO L226 Difference]: Without dead ends: 1915 [2022-01-10 04:21:38,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:21:38,709 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 265 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:38,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 152 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 04:21:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2022-01-10 04:21:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1711. [2022-01-10 04:21:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.2187134502923977) internal successors, (2084), 1710 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2084 transitions. [2022-01-10 04:21:38,739 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2084 transitions. Word has length 233 [2022-01-10 04:21:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:38,739 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2084 transitions. [2022-01-10 04:21:38,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2084 transitions. [2022-01-10 04:21:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-10 04:21:38,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:38,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:38,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:21:38,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:38,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 245378981, now seen corresponding path program 1 times [2022-01-10 04:21:38,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:38,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477262909] [2022-01-10 04:21:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:38,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:38,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:38,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:38,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 04:21:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:21:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 04:21:39,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:39,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477262909] [2022-01-10 04:21:39,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477262909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:39,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:39,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:21:39,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235741615] [2022-01-10 04:21:39,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:39,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:21:39,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:21:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:21:39,507 INFO L87 Difference]: Start difference. First operand 1711 states and 2084 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:39,824 INFO L93 Difference]: Finished difference Result 4227 states and 5295 transitions. [2022-01-10 04:21:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:21:39,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 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 303 [2022-01-10 04:21:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:39,838 INFO L225 Difference]: With dead ends: 4227 [2022-01-10 04:21:39,838 INFO L226 Difference]: Without dead ends: 2760 [2022-01-10 04:21:39,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 301 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 04:21:39,841 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 249 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:39,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 523 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 04:21:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-01-10 04:21:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2758. [2022-01-10 04:21:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2757 states have (on average 1.250272034820457) internal successors, (3447), 2757 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 3447 transitions. [2022-01-10 04:21:39,886 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 3447 transitions. Word has length 303 [2022-01-10 04:21:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:39,886 INFO L470 AbstractCegarLoop]: Abstraction has 2758 states and 3447 transitions. [2022-01-10 04:21:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 3447 transitions. [2022-01-10 04:21:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-10 04:21:39,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:39,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:39,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 04:21:40,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:21:40,104 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1978102540, now seen corresponding path program 1 times [2022-01-10 04:21:40,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674827818] [2022-01-10 04:21:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:40,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:40,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:21:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 04:21:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:21:40,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 04:21:40,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:40,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674827818] [2022-01-10 04:21:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674827818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:40,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:40,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:21:40,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254803450] [2022-01-10 04:21:40,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:21:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:21:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:21:40,643 INFO L87 Difference]: Start difference. First operand 2758 states and 3447 transitions. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:41,877 INFO L93 Difference]: Finished difference Result 9416 states and 12118 transitions. [2022-01-10 04:21:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:21:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 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 311 [2022-01-10 04:21:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:41,897 INFO L225 Difference]: With dead ends: 9416 [2022-01-10 04:21:41,897 INFO L226 Difference]: Without dead ends: 6902 [2022-01-10 04:21:41,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:21:41,902 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 430 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:41,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 456 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 04:21:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2022-01-10 04:21:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 6481. [2022-01-10 04:21:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 6480 states have (on average 1.2489197530864198) internal successors, (8093), 6480 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 8093 transitions. [2022-01-10 04:21:42,022 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 8093 transitions. Word has length 311 [2022-01-10 04:21:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:42,023 INFO L470 AbstractCegarLoop]: Abstraction has 6481 states and 8093 transitions. [2022-01-10 04:21:42,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 8093 transitions. [2022-01-10 04:21:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-10 04:21:42,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:42,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:42,053 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 04:21:42,254 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 04:21:42,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -642246720, now seen corresponding path program 2 times [2022-01-10 04:21:42,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:42,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652556788] [2022-01-10 04:21:42,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:21:42,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:42,258 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 04:21:42,258 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 04:21:42,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:21:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:21:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:21:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 04:21:42,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:42,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:42,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652556788] [2022-01-10 04:21:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652556788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:42,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:21:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433339291] [2022-01-10 04:21:42,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:42,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:21:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:21:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:21:42,861 INFO L87 Difference]: Start difference. First operand 6481 states and 8093 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:43,728 INFO L93 Difference]: Finished difference Result 15974 states and 20612 transitions. [2022-01-10 04:21:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:21:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 317 [2022-01-10 04:21:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:43,751 INFO L225 Difference]: With dead ends: 15974 [2022-01-10 04:21:43,751 INFO L226 Difference]: Without dead ends: 9737 [2022-01-10 04:21:43,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 315 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 04:21:43,763 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:43,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 274 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:21:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9737 states. [2022-01-10 04:21:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9737 to 8918. [2022-01-10 04:21:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 1.2724010317371313) internal successors, (11346), 8917 states have internal predecessors, (11346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 11346 transitions. [2022-01-10 04:21:43,896 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 11346 transitions. Word has length 317 [2022-01-10 04:21:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 8918 states and 11346 transitions. [2022-01-10 04:21:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 11346 transitions. [2022-01-10 04:21:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-10 04:21:43,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:43,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:43,923 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 04:21:44,121 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 04:21:44,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1015431208, now seen corresponding path program 1 times [2022-01-10 04:21:44,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561582535] [2022-01-10 04:21:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:44,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:44,125 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 04:21:44,126 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 04:21:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:21:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 04:21:44,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:44,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561582535] [2022-01-10 04:21:44,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561582535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:44,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:44,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:21:44,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675124261] [2022-01-10 04:21:44,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:44,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:21:44,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:21:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:21:44,687 INFO L87 Difference]: Start difference. First operand 8918 states and 11346 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:21:45,610 INFO L93 Difference]: Finished difference Result 24523 states and 31712 transitions. [2022-01-10 04:21:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:21:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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 345 [2022-01-10 04:21:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:21:45,644 INFO L225 Difference]: With dead ends: 24523 [2022-01-10 04:21:45,644 INFO L226 Difference]: Without dead ends: 15849 [2022-01-10 04:21:45,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 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 04:21:45,659 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 227 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:21:45,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 320 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 04:21:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15849 states. [2022-01-10 04:21:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15849 to 15033. [2022-01-10 04:21:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15033 states, 15032 states have (on average 1.233102714209686) internal successors, (18536), 15032 states have internal predecessors, (18536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15033 states to 15033 states and 18536 transitions. [2022-01-10 04:21:45,895 INFO L78 Accepts]: Start accepts. Automaton has 15033 states and 18536 transitions. Word has length 345 [2022-01-10 04:21:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:21:45,896 INFO L470 AbstractCegarLoop]: Abstraction has 15033 states and 18536 transitions. [2022-01-10 04:21:45,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:21:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 15033 states and 18536 transitions. [2022-01-10 04:21:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-10 04:21:45,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:45,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:45,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 04:21:46,132 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 04:21:46,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 156787378, now seen corresponding path program 1 times [2022-01-10 04:21:46,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626312294] [2022-01-10 04:21:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:46,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:46,136 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 04:21:46,137 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 04:21:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:21:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:21:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 04:21:46,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:21:46,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:21:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626312294] [2022-01-10 04:21:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626312294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:21:46,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:21:46,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:21:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593515670] [2022-01-10 04:21:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:21:46,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:21:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:21:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:21:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:21:46,944 INFO L87 Difference]: Start difference. First operand 15033 states and 18536 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 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)