/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-patterns/array24_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:58:15,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:58:15,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:58:15,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:58:15,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:58:15,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:58:15,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:58:15,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:58:15,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:58:15,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:58:15,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:58:15,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:58:15,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:58:15,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:58:15,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:58:15,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:58:15,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:58:15,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:58:15,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:58:15,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:58:15,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:58:15,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:58:15,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:58:15,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:58:15,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:58:15,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:58:15,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:58:15,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:58:15,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:58:15,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:58:15,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:58:15,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:58:15,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:58:15,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:58:15,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:58:15,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:58:15,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:58:15,345 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:58:15,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:58:15,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:58:15,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:58:15,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:58:15,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:58:15,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:58:15,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:58:15,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:58:15,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:58:15,348 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:58:15,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:58:15,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:58:15,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:58:15,588 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:58:15,588 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:58:15,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array24_pattern.c [2022-01-10 03:58:15,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb5edb01/3f3a7220c8c74223b7d9808cda725fde/FLAGf9dca65f7 [2022-01-10 03:58:16,026 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:58:16,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array24_pattern.c [2022-01-10 03:58:16,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb5edb01/3f3a7220c8c74223b7d9808cda725fde/FLAGf9dca65f7 [2022-01-10 03:58:16,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb5edb01/3f3a7220c8c74223b7d9808cda725fde [2022-01-10 03:58:16,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:58:16,051 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:58:16,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:58:16,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:58:16,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:58:16,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4313210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16, skipping insertion in model container [2022-01-10 03:58:16,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:58:16,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:58:16,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array24_pattern.c[1359,1372] [2022-01-10 03:58:16,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:58:16,278 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:58:16,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array24_pattern.c[1359,1372] [2022-01-10 03:58:16,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:58:16,329 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:58:16,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16 WrapperNode [2022-01-10 03:58:16,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:58:16,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:58:16,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:58:16,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:58:16,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,381 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2022-01-10 03:58:16,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:58:16,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:58:16,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:58:16,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:58:16,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:58:16,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:58:16,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:58:16,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:58:16,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (1/1) ... [2022-01-10 03:58:16,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:58:16,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:58:16,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:58:16,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:58:16,479 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2022-01-10 03:58:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:58:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:58:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:58:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:58:16,540 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:58:16,541 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:58:17,029 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:58:17,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:58:17,035 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 03:58:17,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:58:17 BoogieIcfgContainer [2022-01-10 03:58:17,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:58:17,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:58:17,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:58:17,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:58:17,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:58:16" (1/3) ... [2022-01-10 03:58:17,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a097c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:58:17, skipping insertion in model container [2022-01-10 03:58:17,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:58:16" (2/3) ... [2022-01-10 03:58:17,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a097c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:58:17, skipping insertion in model container [2022-01-10 03:58:17,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:58:17" (3/3) ... [2022-01-10 03:58:17,043 INFO L111 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2022-01-10 03:58:17,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:58:17,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:58:17,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:58:17,084 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 03:58:17,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:58:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:58:17,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:17,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:17,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:17,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2022-01-10 03:58:17,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:17,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492589559] [2022-01-10 03:58:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:17,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:17,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:17,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:58:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:58:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:58:17,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:17,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492589559] [2022-01-10 03:58:17,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492589559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:17,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:17,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:58:17,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896829407] [2022-01-10 03:58:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:58:17,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:58:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:58:17,309 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:58:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:17,328 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2022-01-10 03:58:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:58:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 03:58:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:17,337 INFO L225 Difference]: With dead ends: 77 [2022-01-10 03:58:17,337 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 03:58:17,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:58:17,344 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:17,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:58:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 03:58:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 03:58:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-01-10 03:58:17,381 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2022-01-10 03:58:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:17,381 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-01-10 03:58:17,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:58:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-01-10 03:58:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:58:17,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:17,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:17,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:17,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:17,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2022-01-10 03:58:17,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:17,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578134829] [2022-01-10 03:58:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:17,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:17,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:17,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:58:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:58:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:58:18,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:18,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578134829] [2022-01-10 03:58:18,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578134829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:18,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:18,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:58:18,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378646944] [2022-01-10 03:58:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:18,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:58:18,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:58:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:18,081 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:18,109 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-01-10 03:58:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-01-10 03:58:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:18,113 INFO L225 Difference]: With dead ends: 69 [2022-01-10 03:58:18,113 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 03:58:18,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:18,117 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:18,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 121 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-01-10 03:58:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 03:58:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-10 03:58:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-01-10 03:58:18,132 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 35 [2022-01-10 03:58:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:18,132 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-01-10 03:58:18,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-01-10 03:58:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 03:58:18,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:18,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:18,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:18,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:18,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1511137102, now seen corresponding path program 1 times [2022-01-10 03:58:18,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:18,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120760542] [2022-01-10 03:58:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:18,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:18,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:18,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:58:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:58:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:58:18,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:18,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120760542] [2022-01-10 03:58:18,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120760542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:18,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:18,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:58:18,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113837152] [2022-01-10 03:58:18,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:18,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:58:18,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:18,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:58:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:18,769 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:18,781 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-01-10 03:58:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-01-10 03:58:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:18,783 INFO L225 Difference]: With dead ends: 74 [2022-01-10 03:58:18,783 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:58:18,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:18,785 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:18,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-10 03:58:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:58:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 03:58:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-01-10 03:58:18,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 38 [2022-01-10 03:58:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-01-10 03:58:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-01-10 03:58:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:58:18,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:18,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:58:18,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:19,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:19,011 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -50149008, now seen corresponding path program 1 times [2022-01-10 03:58:19,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327474407] [2022-01-10 03:58:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:19,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:19,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:19,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:58:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:19,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:58:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:58:19,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:58:19,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:19,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327474407] [2022-01-10 03:58:19,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327474407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:19,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-01-10 03:58:19,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090208213] [2022-01-10 03:58:19,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 03:58:19,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 03:58:19,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:58:19,643 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:19,962 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-01-10 03:58:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 03:58:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-01-10 03:58:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:19,963 INFO L225 Difference]: With dead ends: 76 [2022-01-10 03:58:19,963 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 03:58:19,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:58:19,964 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:19,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 169 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-01-10 03:58:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 03:58:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 03:58:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:58:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-10 03:58:19,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 40 [2022-01-10 03:58:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:19,989 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-10 03:58:19,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-10 03:58:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 03:58:19,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:19,990 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 03:58:20,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:58:20,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:20,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -494896466, now seen corresponding path program 2 times [2022-01-10 03:58:20,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95278573] [2022-01-10 03:58:20,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:20,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:20,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:20,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:58:20,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:20,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:58:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:58:20,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 03:58:21,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95278573] [2022-01-10 03:58:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95278573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:21,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:21,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-01-10 03:58:21,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686106202] [2022-01-10 03:58:21,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 03:58:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 03:58:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:58:21,037 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:58:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:21,359 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2022-01-10 03:58:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:58:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 42 [2022-01-10 03:58:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:21,362 INFO L225 Difference]: With dead ends: 86 [2022-01-10 03:58:21,362 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 03:58:21,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:58:21,364 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:21,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 132 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-01-10 03:58:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 03:58:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2022-01-10 03:58:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 03:58:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-01-10 03:58:21,375 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 42 [2022-01-10 03:58:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-01-10 03:58:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:58:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-01-10 03:58:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:58:21,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:21,377 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 03:58:21,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 03:58:21,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:21,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1708514187, now seen corresponding path program 1 times [2022-01-10 03:58:21,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:21,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358060304] [2022-01-10 03:58:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:21,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:21,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:21,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:58:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:58:22,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:58:22,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358060304] [2022-01-10 03:58:22,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358060304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:22,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:22,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-01-10 03:58:22,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819519316] [2022-01-10 03:58:22,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:22,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:58:22,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:58:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:58:22,468 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:23,210 INFO L93 Difference]: Finished difference Result 182 states and 250 transitions. [2022-01-10 03:58:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:58:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-01-10 03:58:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:23,219 INFO L225 Difference]: With dead ends: 182 [2022-01-10 03:58:23,219 INFO L226 Difference]: Without dead ends: 126 [2022-01-10 03:58:23,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:58:23,220 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:23,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 172 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2022-01-10 03:58:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-10 03:58:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2022-01-10 03:58:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 03:58:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2022-01-10 03:58:23,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 45 [2022-01-10 03:58:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:23,230 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2022-01-10 03:58:23,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2022-01-10 03:58:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 03:58:23,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:23,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 03:58:23,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:58:23,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:23,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1484083089, now seen corresponding path program 2 times [2022-01-10 03:58:23,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501290299] [2022-01-10 03:58:23,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:23,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:23,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:23,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:58:23,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:23,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:58:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 03:58:23,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:23,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501290299] [2022-01-10 03:58:23,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501290299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:23,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:23,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:58:23,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679398554] [2022-01-10 03:58:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:23,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:58:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:58:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:23,873 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:23,878 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2022-01-10 03:58:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:58:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-01-10 03:58:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:23,879 INFO L225 Difference]: With dead ends: 141 [2022-01-10 03:58:23,879 INFO L226 Difference]: Without dead ends: 81 [2022-01-10 03:58:23,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:58:23,880 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:23,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 160 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-01-10 03:58:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-10 03:58:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-10 03:58:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 03:58:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2022-01-10 03:58:23,886 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 48 [2022-01-10 03:58:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:23,887 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2022-01-10 03:58:23,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2022-01-10 03:58:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:58:23,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:23,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 03:58:23,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:24,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:24,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1720475155, now seen corresponding path program 3 times [2022-01-10 03:58:24,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:24,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739143235] [2022-01-10 03:58:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:58:24,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:24,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:24,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:24,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:58:24,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:58:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:58:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:58:24,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:24,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739143235] [2022-01-10 03:58:24,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739143235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:24,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:24,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 03:58:24,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721595772] [2022-01-10 03:58:24,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:24,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:58:24,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:58:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:58:24,601 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:24,641 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2022-01-10 03:58:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 03:58:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-01-10 03:58:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:24,642 INFO L225 Difference]: With dead ends: 119 [2022-01-10 03:58:24,642 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 03:58:24,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:58:24,643 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:24,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 03:58:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 03:58:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2022-01-10 03:58:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 82 states have internal predecessors, (105), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-01-10 03:58:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-01-10 03:58:24,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 50 [2022-01-10 03:58:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:24,654 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-01-10 03:58:24,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:58:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-01-10 03:58:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:58:24,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:24,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 03:58:24,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:24,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:24,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1209940978, now seen corresponding path program 1 times [2022-01-10 03:58:24,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:24,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841803752] [2022-01-10 03:58:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:24,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:24,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:24,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:24,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:58:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:58:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:58:25,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:25,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841803752] [2022-01-10 03:58:25,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841803752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:25,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:25,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:58:25,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805991116] [2022-01-10 03:58:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:25,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:58:25,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:58:25,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:58:25,070 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:58:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:25,256 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-01-10 03:58:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:58:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-01-10 03:58:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:25,268 INFO L225 Difference]: With dead ends: 147 [2022-01-10 03:58:25,268 INFO L226 Difference]: Without dead ends: 108 [2022-01-10 03:58:25,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:58:25,269 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:25,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 199 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:58:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-10 03:58:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2022-01-10 03:58:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 77 states have internal predecessors, (97), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 03:58:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-01-10 03:58:25,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 50 [2022-01-10 03:58:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:25,281 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-01-10 03:58:25,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:58:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-01-10 03:58:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:58:25,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:25,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 03:58:25,293 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 03:58:25,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:25,493 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -25526731, now seen corresponding path program 1 times [2022-01-10 03:58:25,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:25,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636555165] [2022-01-10 03:58:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:25,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:25,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:58:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:58:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:58:26,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:58:26,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636555165] [2022-01-10 03:58:26,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636555165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:26,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:26,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-01-10 03:58:26,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651574688] [2022-01-10 03:58:26,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:26,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:58:26,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:58:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:58:26,392 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:27,164 INFO L93 Difference]: Finished difference Result 247 states and 334 transitions. [2022-01-10 03:58:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:58:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-01-10 03:58:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:27,166 INFO L225 Difference]: With dead ends: 247 [2022-01-10 03:58:27,166 INFO L226 Difference]: Without dead ends: 169 [2022-01-10 03:58:27,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:58:27,168 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:27,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 330 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-01-10 03:58:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-10 03:58:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2022-01-10 03:58:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 100 states have internal predecessors, (124), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-01-10 03:58:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2022-01-10 03:58:27,177 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 52 [2022-01-10 03:58:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:27,178 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2022-01-10 03:58:27,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:58:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2022-01-10 03:58:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 03:58:27,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:27,178 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:27,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:27,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1360318877, now seen corresponding path program 2 times [2022-01-10 03:58:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540157667] [2022-01-10 03:58:27,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:58:27,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:27,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:27,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:27,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:58:27,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:58:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:58:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:58:28,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 03:58:28,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:28,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540157667] [2022-01-10 03:58:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540157667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:28,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:58:28,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-01-10 03:58:28,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350024336] [2022-01-10 03:58:28,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:28,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:58:28,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:58:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:58:28,522 INFO L87 Difference]: Start difference. First operand 122 states and 155 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:58:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:28,792 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2022-01-10 03:58:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 03:58:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2022-01-10 03:58:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:28,795 INFO L225 Difference]: With dead ends: 232 [2022-01-10 03:58:28,796 INFO L226 Difference]: Without dead ends: 228 [2022-01-10 03:58:28,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:58:28,798 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:28,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 399 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-01-10 03:58:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-10 03:58:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2022-01-10 03:58:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 173 states have (on average 1.300578034682081) internal successors, (225), 173 states have internal predecessors, (225), 27 states have call successors, (27), 10 states have call predecessors, (27), 11 states have return successors, (38), 28 states have call predecessors, (38), 27 states have call successors, (38) [2022-01-10 03:58:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 290 transitions. [2022-01-10 03:58:28,814 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 290 transitions. Word has length 53 [2022-01-10 03:58:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:28,814 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 290 transitions. [2022-01-10 03:58:28,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:58:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 290 transitions. [2022-01-10 03:58:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 03:58:28,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:28,816 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2022-01-10 03:58:28,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:29,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2106651293, now seen corresponding path program 1 times [2022-01-10 03:58:29,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689854391] [2022-01-10 03:58:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:29,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:29,031 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:29,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 03:58:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:58:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 03:58:29,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:58:29,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689854391] [2022-01-10 03:58:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689854391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:58:29,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:58:29,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:58:29,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571789506] [2022-01-10 03:58:29,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:58:29,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:58:29,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:58:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:58:29,315 INFO L87 Difference]: Start difference. First operand 212 states and 290 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:29,499 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2022-01-10 03:58:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:58:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-01-10 03:58:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:29,502 INFO L225 Difference]: With dead ends: 324 [2022-01-10 03:58:29,502 INFO L226 Difference]: Without dead ends: 186 [2022-01-10 03:58:29,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:58:29,503 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:29,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:58:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-10 03:58:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2022-01-10 03:58:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 153 states have (on average 1.2352941176470589) internal successors, (189), 153 states have internal predecessors, (189), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (26), 20 states have call predecessors, (26), 19 states have call successors, (26) [2022-01-10 03:58:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 234 transitions. [2022-01-10 03:58:29,518 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 234 transitions. Word has length 54 [2022-01-10 03:58:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:29,518 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 234 transitions. [2022-01-10 03:58:29,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:58:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 234 transitions. [2022-01-10 03:58:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 03:58:29,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:29,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-10 03:58:29,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:29,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:29,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash -175998025, now seen corresponding path program 3 times [2022-01-10 03:58:29,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:29,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881848324] [2022-01-10 03:58:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:58:29,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:29,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:29,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 03:58:29,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:58:29,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:58:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 03:58:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:30,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:58:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881848324] [2022-01-10 03:58:30,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881848324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:58:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087271778] [2022-01-10 03:58:30,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:58:30,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:58:30,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:58:30,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:58:30,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-01-10 03:58:30,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:58:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:58:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:58:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:58:30,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:58:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 03:58:31,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087271778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:58:31,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:58:31,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2022-01-10 03:58:31,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142033532] [2022-01-10 03:58:31,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:58:31,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:58:31,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:58:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:58:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:58:31,257 INFO L87 Difference]: Start difference. First operand 182 states and 234 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 03:58:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:58:31,414 INFO L93 Difference]: Finished difference Result 206 states and 265 transitions. [2022-01-10 03:58:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:58:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2022-01-10 03:58:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:58:31,416 INFO L225 Difference]: With dead ends: 206 [2022-01-10 03:58:31,416 INFO L226 Difference]: Without dead ends: 202 [2022-01-10 03:58:31,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:58:31,417 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:58:31,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 174 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-01-10 03:58:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-10 03:58:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 180. [2022-01-10 03:58:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 151 states have (on average 1.2450331125827814) internal successors, (188), 151 states have internal predecessors, (188), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (26), 20 states have call predecessors, (26), 19 states have call successors, (26) [2022-01-10 03:58:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 233 transitions. [2022-01-10 03:58:31,428 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 233 transitions. Word has length 54 [2022-01-10 03:58:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:58:31,428 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 233 transitions. [2022-01-10 03:58:31,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 03:58:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 233 transitions. [2022-01-10 03:58:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 03:58:31,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:58:31,429 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-01-10 03:58:31,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-01-10 03:58:31,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 03:58:31,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:58:31,841 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:58:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:58:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash 962660426, now seen corresponding path program 1 times [2022-01-10 03:58:31,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:58:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034469800] [2022-01-10 03:58:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:58:31,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:58:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:58:31,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:58:31,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 03:58:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:58:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:58:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:58:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 03:58:32,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:59:23,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034469800] [2022-01-10 03:59:23,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034469800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:59:23,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:59:23,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-01-10 03:59:23,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366037777] [2022-01-10 03:59:23,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:59:23,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:59:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=323, Unknown=15, NotChecked=0, Total=462 [2022-01-10 03:59:23,500 INFO L87 Difference]: Start difference. First operand 180 states and 233 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 20 states have internal predecessors, (72), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 03:59:25,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []