/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:42:26,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:42:26,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:42:26,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 02:42:26,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 02:42:26,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 02:42:26,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 02:42:26,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 02:42:26,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 02:42:26,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 02:42:26,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 02:42:26,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 02:42:26,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 02:42:26,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 02:42:26,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 02:42:26,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 02:42:26,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 02:42:26,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 02:42:26,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 02:42:26,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 02:42:26,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 02:42:26,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 02:42:26,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 02:42:26,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 02:42:26,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 02:42:26,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:42:26,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:42:26,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:42:26,302 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 02:42:26,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:42:26,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:42:26,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:42:26,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:42:26,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:42:26,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:42:26,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:42:26,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:42:26,325 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:42:26,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:42:26,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:42:26,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:42:26,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:42:26,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:42:26,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:42:26,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:42:26,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:42:26,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:42:26,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:42:26,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:42:26,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:42:26,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:42:26,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:42:26,540 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:42:26,540 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:42:26,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-01-10 02:42:26,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9b80b01/4a5aa2a0d4a84c348226dc9a66b74501/FLAG677cbe24e [2022-01-10 02:42:26,916 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:42:26,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-01-10 02:42:26,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9b80b01/4a5aa2a0d4a84c348226dc9a66b74501/FLAG677cbe24e [2022-01-10 02:42:27,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9b80b01/4a5aa2a0d4a84c348226dc9a66b74501 [2022-01-10 02:42:27,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:42:27,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:42:27,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:42:27,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:42:27,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:42:27,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bd3366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27, skipping insertion in model container [2022-01-10 02:42:27,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:42:27,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:42:27,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-01-10 02:42:27,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:42:27,559 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:42:27,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-01-10 02:42:27,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:42:27,604 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:42:27,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27 WrapperNode [2022-01-10 02:42:27,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:42:27,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:42:27,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:42:27,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:42:27,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,640 INFO L137 Inliner]: procedures = 72, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2022-01-10 02:42:27,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:42:27,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:42:27,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:42:27,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:42:27,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:42:27,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:42:27,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:42:27,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:42:27,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (1/1) ... [2022-01-10 02:42:27,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:42:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:42:27,698 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 02:42:27,700 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 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 02:42:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-01-10 02:42:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:42:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:42:27,808 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:42:27,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:42:28,060 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:42:28,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:42:28,065 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 02:42:28,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:42:28 BoogieIcfgContainer [2022-01-10 02:42:28,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:42:28,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:42:28,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:42:28,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:42:28,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:42:27" (1/3) ... [2022-01-10 02:42:28,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602eea04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:42:28, skipping insertion in model container [2022-01-10 02:42:28,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:42:27" (2/3) ... [2022-01-10 02:42:28,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602eea04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:42:28, skipping insertion in model container [2022-01-10 02:42:28,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:42:28" (3/3) ... [2022-01-10 02:42:28,071 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-01-10 02:42:28,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:42:28,074 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:42:28,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:42:28,124 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 02:42:28,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:42:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:42:28,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:28,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:28,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2022-01-10 02:42:28,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:28,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109486549] [2022-01-10 02:42:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:42:28,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:28,155 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 02:42:28,156 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 02:42:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:42:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:42:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:28,257 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 02:42:28,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:42:28,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109486549] [2022-01-10 02:42:28,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109486549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:42:28,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:42:28,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:42:28,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400953961] [2022-01-10 02:42:28,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:42:28,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:42:28,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:42:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:42:28,288 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:28,304 INFO L93 Difference]: Finished difference Result 64 states and 98 transitions. [2022-01-10 02:42:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:42:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 02:42:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:28,311 INFO L225 Difference]: With dead ends: 64 [2022-01-10 02:42:28,312 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 02:42:28,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 02:42:28,317 INFO L933 BasicCegarLoop]: 47 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, 47 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 02:42:28,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:42:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 02:42:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 02:42:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-01-10 02:42:28,341 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 8 [2022-01-10 02:42:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:28,341 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-01-10 02:42:28,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-01-10 02:42:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:42:28,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:28,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:28,349 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 02:42:28,548 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 02:42:28,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash 212132138, now seen corresponding path program 1 times [2022-01-10 02:42:28,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:28,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942487823] [2022-01-10 02:42:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:42:28,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:28,552 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 02:42:28,553 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 02:42:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:42:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:42:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:28,615 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 02:42:28,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:42:28,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942487823] [2022-01-10 02:42:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942487823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:42:28,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:42:28,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:42:28,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475184573] [2022-01-10 02:42:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:42:28,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:42:28,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:42:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:42:28,619 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:28,660 INFO L93 Difference]: Finished difference Result 79 states and 109 transitions. [2022-01-10 02:42:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:42:28,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 02:42:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:28,661 INFO L225 Difference]: With dead ends: 79 [2022-01-10 02:42:28,661 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 02:42:28,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:42:28,662 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:28,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:42:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 02:42:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-01-10 02:42:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-10 02:42:28,667 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2022-01-10 02:42:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-10 02:42:28,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-10 02:42:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 02:42:28,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:28,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:28,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 02:42:28,875 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 02:42:28,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2022-01-10 02:42:28,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009308136] [2022-01-10 02:42:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:42:28,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:28,892 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 02:42:28,911 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 02:42:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:42:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:42:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:42:29,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:42:29,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:29,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009308136] [2022-01-10 02:42:29,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009308136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:29,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:29,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:42:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542199334] [2022-01-10 02:42:29,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:29,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:42:29,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:42:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:42:29,067 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:29,175 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2022-01-10 02:42:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:42:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 02:42:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:29,177 INFO L225 Difference]: With dead ends: 128 [2022-01-10 02:42:29,177 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 02:42:29,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:42:29,178 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 208 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:29,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 136 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:42:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 02:42:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-10 02:42:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2022-01-10 02:42:29,186 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2022-01-10 02:42:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:29,186 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2022-01-10 02:42:29,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2022-01-10 02:42:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:42:29,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:29,187 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:29,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 02:42:29,393 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 02:42:29,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2022-01-10 02:42:29,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:29,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285412364] [2022-01-10 02:42:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:42:29,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:29,395 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 02:42:29,397 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 02:42:29,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:42:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:42:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 02:42:29,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 02:42:29,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285412364] [2022-01-10 02:42:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285412364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:29,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:29,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:42:29,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560604886] [2022-01-10 02:42:29,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:42:29,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:42:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:42:29,700 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:30,127 INFO L93 Difference]: Finished difference Result 329 states and 468 transitions. [2022-01-10 02:42:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 02:42:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-10 02:42:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:30,129 INFO L225 Difference]: With dead ends: 329 [2022-01-10 02:42:30,129 INFO L226 Difference]: Without dead ends: 239 [2022-01-10 02:42:30,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:42:30,130 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 764 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:30,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 736 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:42:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-10 02:42:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-01-10 02:42:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.3865546218487395) internal successors, (330), 238 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 330 transitions. [2022-01-10 02:42:30,162 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 330 transitions. Word has length 36 [2022-01-10 02:42:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:30,162 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 330 transitions. [2022-01-10 02:42:30,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 330 transitions. [2022-01-10 02:42:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 02:42:30,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:30,168 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:30,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:30,374 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 02:42:30,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash 158674814, now seen corresponding path program 3 times [2022-01-10 02:42:30,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:30,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273454525] [2022-01-10 02:42:30,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:42:30,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:30,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:30,379 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 02:42:30,380 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 02:42:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:42:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:42:30,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-01-10 02:42:30,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:42:30,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273454525] [2022-01-10 02:42:30,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273454525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:42:30,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:42:30,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:42:30,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126614572] [2022-01-10 02:42:30,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:42:30,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:42:30,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:30,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:42:30,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:42:30,570 INFO L87 Difference]: Start difference. First operand 239 states and 330 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:30,599 INFO L93 Difference]: Finished difference Result 451 states and 632 transitions. [2022-01-10 02:42:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:42:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 02:42:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:30,601 INFO L225 Difference]: With dead ends: 451 [2022-01-10 02:42:30,601 INFO L226 Difference]: Without dead ends: 447 [2022-01-10 02:42:30,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:42:30,602 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:30,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:42:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-10 02:42:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 240. [2022-01-10 02:42:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2022-01-10 02:42:30,618 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 78 [2022-01-10 02:42:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:30,618 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2022-01-10 02:42:30,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2022-01-10 02:42:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 02:42:30,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:30,619 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:30,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:30,824 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 02:42:30,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 1 times [2022-01-10 02:42:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423147847] [2022-01-10 02:42:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:42:30,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:30,827 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 02:42:30,828 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 02:42:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:42:30,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:42:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-01-10 02:42:31,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-01-10 02:42:31,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:31,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423147847] [2022-01-10 02:42:31,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423147847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:31,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:31,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 02:42:31,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666218829] [2022-01-10 02:42:31,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:31,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 02:42:31,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 02:42:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:42:31,456 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:32,816 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2022-01-10 02:42:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 02:42:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 02:42:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:32,819 INFO L225 Difference]: With dead ends: 771 [2022-01-10 02:42:32,819 INFO L226 Difference]: Without dead ends: 554 [2022-01-10 02:42:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:42:32,820 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 3444 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:32,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3444 Valid, 3200 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:42:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-10 02:42:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2022-01-10 02:42:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2022-01-10 02:42:32,838 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2022-01-10 02:42:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2022-01-10 02:42:32,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2022-01-10 02:42:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 02:42:32,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:32,840 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:32,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:33,047 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 02:42:33,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 2 times [2022-01-10 02:42:33,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:33,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385191965] [2022-01-10 02:42:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:42:33,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:33,050 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 02:42:33,052 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 02:42:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:42:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:42:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-01-10 02:42:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-01-10 02:42:34,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385191965] [2022-01-10 02:42:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385191965] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:34,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:34,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 02:42:34,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466653722] [2022-01-10 02:42:34,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:34,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 02:42:34,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 02:42:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 02:42:34,985 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:42,593 INFO L93 Difference]: Finished difference Result 1611 states and 2298 transitions. [2022-01-10 02:42:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 02:42:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-01-10 02:42:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:42,600 INFO L225 Difference]: With dead ends: 1611 [2022-01-10 02:42:42,600 INFO L226 Difference]: Without dead ends: 1142 [2022-01-10 02:42:42,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 02:42:42,602 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 13909 mSDsluCounter, 12768 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13909 SdHoareTripleChecker+Valid, 13328 SdHoareTripleChecker+Invalid, 5053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:42,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13909 Valid, 13328 Invalid, 5053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 4504 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 02:42:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-10 02:42:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1068. [2022-01-10 02:42:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.3908153701968136) internal successors, (1484), 1067 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1484 transitions. [2022-01-10 02:42:42,640 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1484 transitions. Word has length 167 [2022-01-10 02:42:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1484 transitions. [2022-01-10 02:42:42,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1484 transitions. [2022-01-10 02:42:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-10 02:42:42,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:42,644 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:42,658 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 02:42:42,855 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 02:42:42,856 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1679880148, now seen corresponding path program 3 times [2022-01-10 02:42:42,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087844993] [2022-01-10 02:42:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:42:42,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:42,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:42,861 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 02:42:42,863 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 02:42:42,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:42:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:42:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-01-10 02:42:43,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-01-10 02:42:43,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087844993] [2022-01-10 02:42:43,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087844993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:43,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:42:43,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92778392] [2022-01-10 02:42:43,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:43,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:42:43,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:42:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:42:43,916 INFO L87 Difference]: Start difference. First operand 1068 states and 1484 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:44,249 INFO L93 Difference]: Finished difference Result 4148 states and 5853 transitions. [2022-01-10 02:42:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:42:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2022-01-10 02:42:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:44,264 INFO L225 Difference]: With dead ends: 4148 [2022-01-10 02:42:44,264 INFO L226 Difference]: Without dead ends: 4140 [2022-01-10 02:42:44,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:42:44,266 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 239 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:44,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 350 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:42:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2022-01-10 02:42:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 1119. [2022-01-10 02:42:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.3971377459749552) internal successors, (1562), 1118 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1562 transitions. [2022-01-10 02:42:44,348 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1562 transitions. Word has length 335 [2022-01-10 02:42:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:44,349 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1562 transitions. [2022-01-10 02:42:44,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1562 transitions. [2022-01-10 02:42:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-10 02:42:44,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:44,352 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:44,371 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 02:42:44,559 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 02:42:44,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:44,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1761763782, now seen corresponding path program 4 times [2022-01-10 02:42:44,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:44,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334599536] [2022-01-10 02:42:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:42:44,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:44,562 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 02:42:44,563 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 02:42:44,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:42:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 02:42:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7551 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5435 trivial. 0 not checked. [2022-01-10 02:42:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7551 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5435 trivial. 0 not checked. [2022-01-10 02:42:50,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334599536] [2022-01-10 02:42:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334599536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:50,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-01-10 02:42:50,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767995960] [2022-01-10 02:42:50,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 02:42:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 02:42:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 02:42:50,434 INFO L87 Difference]: Start difference. First operand 1119 states and 1562 transitions. Second operand has 96 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:38,013 INFO L93 Difference]: Finished difference Result 5841 states and 8598 transitions. [2022-01-10 02:43:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-10 02:43:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2022-01-10 02:43:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:38,050 INFO L225 Difference]: With dead ends: 5841 [2022-01-10 02:43:38,051 INFO L226 Difference]: Without dead ends: 4817 [2022-01-10 02:43:38,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=6814, Invalid=13208, Unknown=0, NotChecked=0, Total=20022 [2022-01-10 02:43:38,060 INFO L933 BasicCegarLoop]: 1136 mSDtfsCounter, 72856 mSDsluCounter, 53180 mSDsCounter, 0 mSdLazyCounter, 18230 mSolverCounterSat, 2652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72856 SdHoareTripleChecker+Valid, 54316 SdHoareTripleChecker+Invalid, 20882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2652 IncrementalHoareTripleChecker+Valid, 18230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:38,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72856 Valid, 54316 Invalid, 20882 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2652 Valid, 18230 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-01-10 02:43:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4817 states. [2022-01-10 02:43:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4817 to 2223. [2022-01-10 02:43:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.3942394239423943) internal successors, (3098), 2222 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3098 transitions. [2022-01-10 02:43:38,238 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3098 transitions. Word has length 350 [2022-01-10 02:43:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:38,239 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3098 transitions. [2022-01-10 02:43:38,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3098 transitions. [2022-01-10 02:43:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-01-10 02:43:38,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:38,249 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:38,277 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 02:43:38,462 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 02:43:38,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1068072922, now seen corresponding path program 5 times [2022-01-10 02:43:38,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:38,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834051081] [2022-01-10 02:43:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:43:38,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:38,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:38,465 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 02:43:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process