/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:16:18,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:16:18,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:16:18,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:16:18,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:16:18,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:16:18,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:16:18,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:16:18,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:16:18,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:16:18,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:16:18,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:16:18,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:16:18,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:16:18,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:16:18,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:16:18,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:16:18,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:16:18,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:16:18,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:16:18,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:16:18,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:16:18,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:16:18,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:16:18,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 19:16:18,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:16:18,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:16:18,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:16:18,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:16:18,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:16:18,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:16:18,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:16:18,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:16:18,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:16:18,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:16:18,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:16:18,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf [2019-12-27 19:16:18,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:16:18,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:16:18,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:16:18,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:16:18,542 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:16:18,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:16:18,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:16:18,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:16:18,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:16:18,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:16:18,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:16:18,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:16:18,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:16:18,545 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:16:18,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:16:18,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:16:18,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:16:18,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:16:18,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:16:18,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:16:18,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:16:18,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:16:18,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:16:18,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:16:18,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:16:18,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:16:18,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:16:18,548 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:16:18,549 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 19:16:18,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:16:18,550 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:16:18,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:16:18,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:16:18,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:16:18,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:16:18,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:16:18,833 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:16:18,833 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2019-12-27 19:16:18,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf5be6df/7ffb97ad7c934646b9c7a5ff8f624e9e/FLAGf3e254f35 [2019-12-27 19:16:19,488 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:16:19,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2019-12-27 19:16:19,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf5be6df/7ffb97ad7c934646b9c7a5ff8f624e9e/FLAGf3e254f35 [2019-12-27 19:16:19,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf5be6df/7ffb97ad7c934646b9c7a5ff8f624e9e [2019-12-27 19:16:19,758 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:16:19,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:16:19,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:19,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:16:19,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:16:19,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1511a0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19, skipping insertion in model container [2019-12-27 19:16:19,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:16:19,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:16:20,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:20,484 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:16:20,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:20,681 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:16:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20 WrapperNode [2019-12-27 19:16:20,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:20,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:20,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:16:20,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:16:20,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:20,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:16:20,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:16:20,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:16:20,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... [2019-12-27 19:16:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:16:20,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:16:20,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:16:20,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:16:20,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:16:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:16:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:16:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-27 19:16:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2019-12-27 19:16:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2019-12-27 19:16:20,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:16:20,850 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-27 19:16:20,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:16:20,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:16:20,853 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 19:16:21,330 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:16:21,330 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-12-27 19:16:21,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:21 BoogieIcfgContainer [2019-12-27 19:16:21,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:16:21,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:16:21,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:16:21,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:16:21,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:16:19" (1/3) ... [2019-12-27 19:16:21,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1020a85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:21, skipping insertion in model container [2019-12-27 19:16:21,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:20" (2/3) ... [2019-12-27 19:16:21,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1020a85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:21, skipping insertion in model container [2019-12-27 19:16:21,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:21" (3/3) ... [2019-12-27 19:16:21,341 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2019-12-27 19:16:21,352 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:16:21,352 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:16:21,359 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:16:21,360 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:16:21,389 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,390 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,390 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,390 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,390 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,391 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,391 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,391 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,391 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,392 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,392 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,392 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,392 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,392 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,393 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,394 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,394 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,394 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,394 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,394 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,395 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,395 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,395 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,395 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,395 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,396 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,396 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,396 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,396 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,397 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,397 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,397 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,398 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,398 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,398 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,398 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,399 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,399 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,399 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,399 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,399 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,400 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,400 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,400 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,400 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,401 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,401 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,401 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,401 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,402 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,402 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,402 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,402 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,403 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,403 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,403 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,403 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,404 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,404 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,404 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,404 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,405 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,405 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,405 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,405 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,406 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,406 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,406 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,406 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,407 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,407 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,407 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,408 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,408 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,408 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,408 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,409 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,409 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,409 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,409 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,410 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,410 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,414 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,414 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,415 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,415 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,415 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,415 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,415 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,416 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,432 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,432 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,432 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,432 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,433 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,433 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,433 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,433 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,433 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,434 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,434 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,434 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,434 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,435 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,435 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:21,469 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 19:16:21,488 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:16:21,488 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:16:21,488 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:16:21,488 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:16:21,488 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:16:21,488 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:16:21,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:16:21,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:16:21,502 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions [2019-12-27 19:16:21,503 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 19:16:21,584 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 19:16:21,584 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 19:16:21,595 INFO L76 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2019-12-27 19:16:21,602 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 19:16:21,630 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 19:16:21,631 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 19:16:21,633 INFO L76 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2019-12-27 19:16:21,639 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2019-12-27 19:16:21,640 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 19:16:23,736 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-12-27 19:16:23,913 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2019-12-27 19:16:23,913 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2019-12-27 19:16:23,917 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 25 transitions [2019-12-27 19:16:23,926 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2019-12-27 19:16:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-12-27 19:16:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:16:23,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:23,936 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,936 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2019-12-27 19:16:23,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:23,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611919940] [2019-12-27 19:16:23,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611919940] [2019-12-27 19:16:24,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:24,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:16:24,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1260025703] [2019-12-27 19:16:24,219 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,227 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,245 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 19:16:24,246 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,252 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:16:24,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:16:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:16:24,271 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2019-12-27 19:16:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,345 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2019-12-27 19:16:24,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:16:24,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-27 19:16:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,357 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:16:24,357 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 19:16:24,358 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:16:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 19:16:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 19:16:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 19:16:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 19:16:24,394 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2019-12-27 19:16:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,395 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 19:16:24,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:16:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 19:16:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:16:24,395 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,395 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,396 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2019-12-27 19:16:24,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189591780] [2019-12-27 19:16:24,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189591780] [2019-12-27 19:16:24,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337568103] [2019-12-27 19:16:24,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 19:16:24,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:24,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-27 19:16:24,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1090883712] [2019-12-27 19:16:24,613 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,614 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,617 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 19:16:24,617 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,617 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:16:24,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:16:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:24,619 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 4 states. [2019-12-27 19:16:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,658 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2019-12-27 19:16:24,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:16:24,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-27 19:16:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,660 INFO L225 Difference]: With dead ends: 42 [2019-12-27 19:16:24,660 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 19:16:24,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 19:16:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 19:16:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 19:16:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2019-12-27 19:16:24,668 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2019-12-27 19:16:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,668 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2019-12-27 19:16:24,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:16:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2019-12-27 19:16:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:24,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,669 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,877 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2019-12-27 19:16:24,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427157101] [2019-12-27 19:16:24,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427157101] [2019-12-27 19:16:24,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806598152] [2019-12-27 19:16:24,943 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:25,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-27 19:16:25,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:25,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:16:25,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:25,091 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 85 [2019-12-27 19:16:25,093 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,149 INFO L614 ElimStorePlain]: treesize reduction 69, result has 18.8 percent of original size [2019-12-27 19:16:25,150 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,150 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:8 [2019-12-27 19:16:25,186 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-27 19:16:25,187 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,195 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 19:16:25,196 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,196 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-12-27 19:16:25,226 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2019-12-27 19:16:25,233 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,245 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 19:16:25,246 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-27 19:16:25,247 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2019-12-27 19:16:25,311 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2019-12-27 19:16:25,312 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,340 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 19:16:25,341 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 19:16:25,341 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2019-12-27 19:16:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:25,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:16:25,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2019-12-27 19:16:25,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1349442112] [2019-12-27 19:16:25,356 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:25,357 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:25,359 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 19:16:25,359 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:25,360 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:25,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:25,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:16:25,361 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2019-12-27 19:16:32,237 WARN L192 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-12-27 19:16:36,672 WARN L192 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2019-12-27 19:16:39,577 WARN L192 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 37 [2019-12-27 19:16:45,118 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 41 [2019-12-27 19:16:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:50,641 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2019-12-27 19:16:50,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:16:50,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-27 19:16:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:50,651 INFO L225 Difference]: With dead ends: 98 [2019-12-27 19:16:50,651 INFO L226 Difference]: Without dead ends: 98 [2019-12-27 19:16:50,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-27 19:16:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 52. [2019-12-27 19:16:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:16:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 19:16:50,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2019-12-27 19:16:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:50,665 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 19:16:50,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 19:16:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:50,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:50,666 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:50,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:50,867 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2019-12-27 19:16:50,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:50,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959117214] [2019-12-27 19:16:50,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:16:50,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959117214] [2019-12-27 19:16:50,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815305194] [2019-12-27 19:16:50,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:50,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 19:16:50,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:16:50,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:50,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 19:16:50,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1168247863] [2019-12-27 19:16:50,994 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:50,996 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:50,997 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 19:16:50,998 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:50,998 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:50,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-27 19:16:50,999 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 5 states. [2019-12-27 19:16:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:51,014 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2019-12-27 19:16:51,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:51,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-27 19:16:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:51,015 INFO L225 Difference]: With dead ends: 53 [2019-12-27 19:16:51,015 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 19:16:51,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-27 19:16:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 19:16:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 19:16:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 19:16:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2019-12-27 19:16:51,021 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2019-12-27 19:16:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:51,021 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2019-12-27 19:16:51,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2019-12-27 19:16:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:51,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:51,023 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,226 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2019-12-27 19:16:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071250260] [2019-12-27 19:16:51,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:16:51,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071250260] [2019-12-27 19:16:51,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520194107] [2019-12-27 19:16:51,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:51,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:16:51,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:51,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 19:16:51,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [68344810] [2019-12-27 19:16:51,360 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:51,361 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:51,363 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 19:16:51,363 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:51,364 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:51,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:51,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:51,365 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 6 states. [2019-12-27 19:16:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:51,385 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2019-12-27 19:16:51,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:51,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-27 19:16:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:51,386 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:16:51,386 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 19:16:51,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 19:16:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 19:16:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 19:16:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2019-12-27 19:16:51,393 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2019-12-27 19:16:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:51,393 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2019-12-27 19:16:51,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2019-12-27 19:16:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:51,394 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:51,395 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,599 INFO L410 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2019-12-27 19:16:51,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934917860] [2019-12-27 19:16:51,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 19:16:51,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934917860] [2019-12-27 19:16:51,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625996640] [2019-12-27 19:16:51,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:51,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:51,809 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-27 19:16:51,809 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:51,816 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 19:16:51,817 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 19:16:51,817 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-12-27 19:16:51,841 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-27 19:16:51,842 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 19:16:51,847 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 19:16:51,847 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 19:16:51,848 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-27 19:16:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 19:16:51,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:16:51,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2019-12-27 19:16:51,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [397730985] [2019-12-27 19:16:51,888 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:51,890 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:51,896 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 19:16:51,896 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:51,896 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:51,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:51,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:51,897 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2019-12-27 19:16:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,102 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 19:16:52,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:52,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 19:16:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,103 INFO L225 Difference]: With dead ends: 74 [2019-12-27 19:16:52,104 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 19:16:52,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 19:16:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2019-12-27 19:16:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 19:16:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2019-12-27 19:16:52,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2019-12-27 19:16:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,110 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2019-12-27 19:16:52,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2019-12-27 19:16:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:52,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,111 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:52,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,321 INFO L410 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2019-12-27 19:16:52,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:52,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055163005] [2019-12-27 19:16:52,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:52,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055163005] [2019-12-27 19:16:52,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942999069] [2019-12-27 19:16:52,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 19:16:52,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:52,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:52,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:16:52,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1921281269] [2019-12-27 19:16:52,476 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:52,477 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:52,479 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 19:16:52,480 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:52,480 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:52,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:52,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:52,481 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 7 states. [2019-12-27 19:16:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,517 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-12-27 19:16:52,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:52,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-12-27 19:16:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,519 INFO L225 Difference]: With dead ends: 50 [2019-12-27 19:16:52,519 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 19:16:52,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 19:16:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 19:16:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 19:16:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2019-12-27 19:16:52,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2019-12-27 19:16:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,532 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2019-12-27 19:16:52,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2019-12-27 19:16:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:16:52,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,533 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:52,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,736 INFO L410 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2019-12-27 19:16:52,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:52,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442416721] [2019-12-27 19:16:52,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:52,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442416721] [2019-12-27 19:16:52,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651060569] [2019-12-27 19:16:52,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:52,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:52,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:16:52,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:52,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:52,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 19:16:52,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1294027254] [2019-12-27 19:16:52,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:52,911 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:52,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 14 transitions. [2019-12-27 19:16:52,914 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:52,914 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:52,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:52,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:16:52,915 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 8 states. [2019-12-27 19:16:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,941 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2019-12-27 19:16:52,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:52,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-27 19:16:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,943 INFO L225 Difference]: With dead ends: 51 [2019-12-27 19:16:52,943 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 19:16:52,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:16:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 19:16:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-27 19:16:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 19:16:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2019-12-27 19:16:52,947 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2019-12-27 19:16:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,947 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2019-12-27 19:16:52,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2019-12-27 19:16:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:16:52,948 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,949 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,153 INFO L410 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2019-12-27 19:16:53,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542180689] [2019-12-27 19:16:53,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:53,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542180689] [2019-12-27 19:16:53,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854779927] [2019-12-27 19:16:53,244 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:16:53,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:53,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 19:16:53,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087508829] [2019-12-27 19:16:53,324 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,326 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,329 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 15 transitions. [2019-12-27 19:16:53,329 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,329 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:53,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:53,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:53,330 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 9 states. [2019-12-27 19:16:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:53,351 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2019-12-27 19:16:53,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:53,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-27 19:16:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:53,353 INFO L225 Difference]: With dead ends: 52 [2019-12-27 19:16:53,353 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 19:16:53,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 19:16:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 19:16:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:16:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2019-12-27 19:16:53,357 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2019-12-27 19:16:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:53,357 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2019-12-27 19:16:53,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2019-12-27 19:16:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:16:53,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:53,358 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,562 INFO L410 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2019-12-27 19:16:53,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911418699] [2019-12-27 19:16:53,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:53,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911418699] [2019-12-27 19:16:53,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278388979] [2019-12-27 19:16:53,663 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:53,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:53,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 19:16:53,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1447031228] [2019-12-27 19:16:53,721 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,726 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,730 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 16 transitions. [2019-12-27 19:16:53,730 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,731 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:53,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:16:53,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:16:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:16:53,732 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 10 states. [2019-12-27 19:16:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:53,773 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2019-12-27 19:16:53,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:16:53,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-27 19:16:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:53,774 INFO L225 Difference]: With dead ends: 53 [2019-12-27 19:16:53,774 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 19:16:53,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:16:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 19:16:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 19:16:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 19:16:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2019-12-27 19:16:53,778 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2019-12-27 19:16:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:53,778 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2019-12-27 19:16:53,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:16:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2019-12-27 19:16:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:16:53,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:53,779 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,987 INFO L410 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2019-12-27 19:16:53,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545208028] [2019-12-27 19:16:53,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:54,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545208028] [2019-12-27 19:16:54,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701212977] [2019-12-27 19:16:54,065 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:16:54,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:54,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:54,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:54,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:54,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:16:54,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1524576518] [2019-12-27 19:16:54,156 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:54,158 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:54,163 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 17 transitions. [2019-12-27 19:16:54,163 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:54,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:54,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:16:54,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:16:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:54,165 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 11 states. [2019-12-27 19:16:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:54,185 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2019-12-27 19:16:54,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:16:54,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-12-27 19:16:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:54,186 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:16:54,186 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 19:16:54,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 19:16:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 19:16:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 19:16:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2019-12-27 19:16:54,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2019-12-27 19:16:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:54,191 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2019-12-27 19:16:54,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:16:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2019-12-27 19:16:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:16:54,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:54,192 INFO L411 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:54,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,396 INFO L410 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2019-12-27 19:16:54,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:54,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799138693] [2019-12-27 19:16:54,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:54,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799138693] [2019-12-27 19:16:54,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003999654] [2019-12-27 19:16:54,512 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,604 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 19:16:54,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:54,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:54,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:54,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:54,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:16:54,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444058988] [2019-12-27 19:16:54,619 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:54,622 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:54,624 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 18 transitions. [2019-12-27 19:16:54,625 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:54,625 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:54,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:16:54,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:16:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:54,626 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 12 states. [2019-12-27 19:16:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:54,652 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2019-12-27 19:16:54,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:16:54,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-12-27 19:16:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:54,653 INFO L225 Difference]: With dead ends: 55 [2019-12-27 19:16:54,653 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 19:16:54,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 19:16:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-12-27 19:16:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:16:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2019-12-27 19:16:54,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2019-12-27 19:16:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:54,658 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2019-12-27 19:16:54,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:16:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2019-12-27 19:16:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:16:54,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:54,659 INFO L411 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:54,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,863 INFO L410 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2019-12-27 19:16:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:54,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720116410] [2019-12-27 19:16:54,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:54,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720116410] [2019-12-27 19:16:54,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202604311] [2019-12-27 19:16:54,982 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:16:55,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:55,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:55,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:16:55,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2119548079] [2019-12-27 19:16:55,046 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:55,049 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:55,052 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 19 transitions. [2019-12-27 19:16:55,052 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:55,052 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:55,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:16:55,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:55,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:16:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:55,054 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 13 states. [2019-12-27 19:16:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:55,082 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2019-12-27 19:16:55,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:16:55,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-12-27 19:16:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:55,083 INFO L225 Difference]: With dead ends: 56 [2019-12-27 19:16:55,083 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 19:16:55,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 19:16:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 19:16:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 19:16:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2019-12-27 19:16:55,088 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2019-12-27 19:16:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:55,088 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2019-12-27 19:16:55,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:16:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2019-12-27 19:16:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:16:55,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:55,089 INFO L411 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,293 INFO L410 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2019-12-27 19:16:55,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306013352] [2019-12-27 19:16:55,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:55,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306013352] [2019-12-27 19:16:55,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845711103] [2019-12-27 19:16:55,403 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:55,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:55,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:16:55,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:55,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:55,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 19:16:55,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [899260668] [2019-12-27 19:16:55,481 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:55,485 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:55,489 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 20 transitions. [2019-12-27 19:16:55,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:55,490 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:55,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:16:55,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:55,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:16:55,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:16:55,491 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 14 states. [2019-12-27 19:16:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:55,550 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2019-12-27 19:16:55,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 19:16:55,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2019-12-27 19:16:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:55,552 INFO L225 Difference]: With dead ends: 57 [2019-12-27 19:16:55,552 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 19:16:55,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:16:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 19:16:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-27 19:16:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 19:16:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2019-12-27 19:16:55,555 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2019-12-27 19:16:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:55,555 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2019-12-27 19:16:55,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:16:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2019-12-27 19:16:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 19:16:55,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:55,556 INFO L411 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,764 INFO L410 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2019-12-27 19:16:55,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959400641] [2019-12-27 19:16:55,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:55,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959400641] [2019-12-27 19:16:55,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219730782] [2019-12-27 19:16:55,897 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-27 19:16:56,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:56,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 19:16:56,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:56,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:56,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 19:16:56,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900810970] [2019-12-27 19:16:56,071 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:56,076 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:56,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 21 transitions. [2019-12-27 19:16:56,082 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:56,082 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:56,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:16:56,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:16:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:56,083 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 15 states. [2019-12-27 19:16:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:56,118 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2019-12-27 19:16:56,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:16:56,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2019-12-27 19:16:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:56,120 INFO L225 Difference]: With dead ends: 58 [2019-12-27 19:16:56,120 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 19:16:56,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 19:16:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 19:16:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 19:16:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2019-12-27 19:16:56,127 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2019-12-27 19:16:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:56,130 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2019-12-27 19:16:56,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:16:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2019-12-27 19:16:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 19:16:56,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:56,132 INFO L411 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:56,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,337 INFO L410 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2019-12-27 19:16:56,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:56,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766699474] [2019-12-27 19:16:56,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:56,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766699474] [2019-12-27 19:16:56,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242047730] [2019-12-27 19:16:56,525 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:56,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:56,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:16:56,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:56,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:56,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 19:16:56,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [314009210] [2019-12-27 19:16:56,641 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:56,647 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:56,653 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 22 transitions. [2019-12-27 19:16:56,654 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:56,654 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:56,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:16:56,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:16:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:16:56,655 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 16 states. [2019-12-27 19:16:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:56,693 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2019-12-27 19:16:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 19:16:56,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2019-12-27 19:16:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:56,694 INFO L225 Difference]: With dead ends: 59 [2019-12-27 19:16:56,694 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 19:16:56,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:16:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 19:16:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-27 19:16:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 19:16:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2019-12-27 19:16:56,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2019-12-27 19:16:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:56,703 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2019-12-27 19:16:56,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:16:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2019-12-27 19:16:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 19:16:56,706 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:56,706 INFO L411 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:56,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,914 INFO L410 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2019-12-27 19:16:56,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:56,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113362930] [2019-12-27 19:16:56,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:57,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113362930] [2019-12-27 19:16:57,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654535743] [2019-12-27 19:16:57,076 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:57,184 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 19:16:57,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:57,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:16:57,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:57,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:57,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 19:16:57,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1018343255] [2019-12-27 19:16:57,196 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:57,199 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:57,203 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 23 transitions. [2019-12-27 19:16:57,203 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:57,203 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:57,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:16:57,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:16:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:16:57,205 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 17 states. [2019-12-27 19:16:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:57,260 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2019-12-27 19:16:57,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:16:57,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2019-12-27 19:16:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:57,261 INFO L225 Difference]: With dead ends: 60 [2019-12-27 19:16:57,261 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:16:57,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:16:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:16:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 19:16:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:16:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2019-12-27 19:16:57,264 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2019-12-27 19:16:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:57,265 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2019-12-27 19:16:57,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:16:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2019-12-27 19:16:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 19:16:57,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:57,266 INFO L411 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:57,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:57,473 INFO L410 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:57,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2019-12-27 19:16:57,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:57,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864424316] [2019-12-27 19:16:57,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:57,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864424316] [2019-12-27 19:16:57,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195424957] [2019-12-27 19:16:57,635 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:57,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-27 19:16:57,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:57,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 19:16:57,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:57,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:57,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 19:16:57,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276069953] [2019-12-27 19:16:57,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:57,851 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:57,856 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 24 transitions. [2019-12-27 19:16:57,856 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:57,857 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:57,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:16:57,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:16:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:57,858 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 18 states. [2019-12-27 19:16:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:57,894 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2019-12-27 19:16:57,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:16:57,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-12-27 19:16:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:57,895 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:16:57,895 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 19:16:57,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 19:16:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-27 19:16:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-27 19:16:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2019-12-27 19:16:57,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2019-12-27 19:16:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:57,898 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2019-12-27 19:16:57,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:16:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2019-12-27 19:16:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 19:16:57,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:57,899 INFO L411 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:58,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,104 INFO L410 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2019-12-27 19:16:58,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:58,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524548245] [2019-12-27 19:16:58,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:58,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524548245] [2019-12-27 19:16:58,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784529525] [2019-12-27 19:16:58,344 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:58,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:16:58,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:58,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:58,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 19:16:58,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7882989] [2019-12-27 19:16:58,421 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:58,425 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:58,430 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 25 transitions. [2019-12-27 19:16:58,431 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:58,431 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:58,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:16:58,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:16:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:16:58,433 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 19 states. [2019-12-27 19:16:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:58,459 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2019-12-27 19:16:58,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:16:58,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-12-27 19:16:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:58,460 INFO L225 Difference]: With dead ends: 62 [2019-12-27 19:16:58,461 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 19:16:58,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:16:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 19:16:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 19:16:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 19:16:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2019-12-27 19:16:58,463 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2019-12-27 19:16:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:58,464 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2019-12-27 19:16:58,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:16:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2019-12-27 19:16:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 19:16:58,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:58,464 INFO L411 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:58,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,668 INFO L410 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:58,668 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2019-12-27 19:16:58,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:58,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678930568] [2019-12-27 19:16:58,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:58,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678930568] [2019-12-27 19:16:58,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957022047] [2019-12-27 19:16:58,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:58,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:58,951 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:16:58,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:58,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:58,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 19:16:58,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [20773752] [2019-12-27 19:16:58,963 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:58,967 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:58,973 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 26 transitions. [2019-12-27 19:16:58,973 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:58,973 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:58,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:16:58,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:16:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:16:58,975 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 20 states. [2019-12-27 19:16:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:59,000 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2019-12-27 19:16:59,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:16:59,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-12-27 19:16:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:59,002 INFO L225 Difference]: With dead ends: 63 [2019-12-27 19:16:59,002 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 19:16:59,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:16:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 19:16:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-27 19:16:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 19:16:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2019-12-27 19:16:59,005 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2019-12-27 19:16:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:59,005 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2019-12-27 19:16:59,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:16:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2019-12-27 19:16:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 19:16:59,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:59,006 INFO L411 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:59,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,209 INFO L410 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2019-12-27 19:16:59,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:59,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831523226] [2019-12-27 19:16:59,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:59,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831523226] [2019-12-27 19:16:59,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036312768] [2019-12-27 19:16:59,425 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-27 19:16:59,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:59,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 19:16:59,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:16:59,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:59,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 19:16:59,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [598204812] [2019-12-27 19:16:59,722 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:59,726 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:59,732 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 27 transitions. [2019-12-27 19:16:59,733 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:59,733 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:59,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:16:59,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:16:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:59,734 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 21 states. [2019-12-27 19:16:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:59,774 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2019-12-27 19:16:59,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:16:59,775 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2019-12-27 19:16:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:59,775 INFO L225 Difference]: With dead ends: 64 [2019-12-27 19:16:59,775 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 19:16:59,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 19:16:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 19:16:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 19:16:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2019-12-27 19:16:59,778 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2019-12-27 19:16:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:59,778 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2019-12-27 19:16:59,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:16:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2019-12-27 19:16:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 19:16:59,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:59,779 INFO L411 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:16:59,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,980 INFO L410 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:16:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2019-12-27 19:16:59,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:59,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946374494] [2019-12-27 19:16:59,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:00,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946374494] [2019-12-27 19:17:00,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202425426] [2019-12-27 19:17:00,242 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:00,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:00,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:00,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:17:00,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:00,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:00,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 19:17:00,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [396413315] [2019-12-27 19:17:00,317 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:00,322 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:00,330 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 28 transitions. [2019-12-27 19:17:00,330 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:00,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:00,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:17:00,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:17:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:00,331 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 22 states. [2019-12-27 19:17:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:00,369 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2019-12-27 19:17:00,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:17:00,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-12-27 19:17:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:00,370 INFO L225 Difference]: With dead ends: 65 [2019-12-27 19:17:00,370 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 19:17:00,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 19:17:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-27 19:17:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-27 19:17:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2019-12-27 19:17:00,373 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2019-12-27 19:17:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:00,374 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2019-12-27 19:17:00,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:17:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2019-12-27 19:17:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 19:17:00,374 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:00,374 INFO L411 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:00,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:00,575 INFO L410 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2019-12-27 19:17:00,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:00,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8117882] [2019-12-27 19:17:00,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:00,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8117882] [2019-12-27 19:17:00,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89663091] [2019-12-27 19:17:00,851 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:01,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 19:17:01,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:01,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:17:01,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:01,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:01,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 19:17:01,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1136062049] [2019-12-27 19:17:01,061 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:01,067 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:01,074 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 29 transitions. [2019-12-27 19:17:01,074 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:01,075 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:01,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:17:01,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:17:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:17:01,078 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 23 states. [2019-12-27 19:17:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:01,117 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2019-12-27 19:17:01,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:17:01,118 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2019-12-27 19:17:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:01,119 INFO L225 Difference]: With dead ends: 66 [2019-12-27 19:17:01,119 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 19:17:01,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:17:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 19:17:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 19:17:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 19:17:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2019-12-27 19:17:01,123 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2019-12-27 19:17:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:01,124 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2019-12-27 19:17:01,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:17:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2019-12-27 19:17:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 19:17:01,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:01,125 INFO L411 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:01,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:01,329 INFO L410 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2019-12-27 19:17:01,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:01,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996566819] [2019-12-27 19:17:01,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:01,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996566819] [2019-12-27 19:17:01,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389536779] [2019-12-27 19:17:01,614 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:02,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-27 19:17:02,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:02,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:17:02,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:02,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:02,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 19:17:02,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578911916] [2019-12-27 19:17:02,653 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:02,659 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:02,667 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 30 transitions. [2019-12-27 19:17:02,667 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:02,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:02,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 19:17:02,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 19:17:02,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:17:02,668 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 24 states. [2019-12-27 19:17:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:02,708 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2019-12-27 19:17:02,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:17:02,708 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2019-12-27 19:17:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:02,709 INFO L225 Difference]: With dead ends: 67 [2019-12-27 19:17:02,709 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 19:17:02,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:17:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 19:17:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-12-27 19:17:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 19:17:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2019-12-27 19:17:02,712 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2019-12-27 19:17:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:02,712 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2019-12-27 19:17:02,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 19:17:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2019-12-27 19:17:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 19:17:02,713 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:02,713 INFO L411 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:02,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:02,918 INFO L410 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2019-12-27 19:17:02,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:02,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037870420] [2019-12-27 19:17:02,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:03,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037870420] [2019-12-27 19:17:03,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542299995] [2019-12-27 19:17:03,392 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 19:17:03,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:03,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:03,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 19:17:03,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1980704812] [2019-12-27 19:17:03,471 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:03,479 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:03,489 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 31 transitions. [2019-12-27 19:17:03,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:03,490 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:03,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 19:17:03,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 19:17:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:17:03,492 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 25 states. [2019-12-27 19:17:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:03,532 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2019-12-27 19:17:03,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:17:03,532 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2019-12-27 19:17:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:03,533 INFO L225 Difference]: With dead ends: 68 [2019-12-27 19:17:03,533 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 19:17:03,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:17:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 19:17:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 19:17:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 19:17:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2019-12-27 19:17:03,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2019-12-27 19:17:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:03,537 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2019-12-27 19:17:03,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 19:17:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2019-12-27 19:17:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 19:17:03,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:03,538 INFO L411 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:03,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,741 INFO L410 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2019-12-27 19:17:03,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:03,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222197885] [2019-12-27 19:17:03,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:04,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222197885] [2019-12-27 19:17:04,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693080267] [2019-12-27 19:17:04,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:04,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:04,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:04,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 19:17:04,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:04,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:04,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 19:17:04,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1116256448] [2019-12-27 19:17:04,385 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:04,396 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:04,411 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 32 transitions. [2019-12-27 19:17:04,411 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:04,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:04,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 19:17:04,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 19:17:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:17:04,414 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 26 states. [2019-12-27 19:17:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:04,477 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2019-12-27 19:17:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:17:04,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2019-12-27 19:17:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:04,479 INFO L225 Difference]: With dead ends: 69 [2019-12-27 19:17:04,479 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:17:04,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:17:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:17:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-27 19:17:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-27 19:17:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2019-12-27 19:17:04,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2019-12-27 19:17:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:04,485 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2019-12-27 19:17:04,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 19:17:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2019-12-27 19:17:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 19:17:04,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:04,487 INFO L411 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:04,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:04,691 INFO L410 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:04,691 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2019-12-27 19:17:04,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:04,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396922880] [2019-12-27 19:17:04,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:05,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396922880] [2019-12-27 19:17:05,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668253790] [2019-12-27 19:17:05,029 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:06,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-12-27 19:17:06,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:06,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 19:17:06,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:06,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:06,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 19:17:06,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [333851143] [2019-12-27 19:17:06,698 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:06,704 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:06,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 33 transitions. [2019-12-27 19:17:06,712 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:06,713 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:06,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 19:17:06,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 19:17:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:17:06,714 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 27 states. [2019-12-27 19:17:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:06,754 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2019-12-27 19:17:06,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:17:06,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2019-12-27 19:17:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:06,756 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:17:06,756 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 19:17:06,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:17:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 19:17:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 19:17:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 19:17:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2019-12-27 19:17:06,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2019-12-27 19:17:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:06,758 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2019-12-27 19:17:06,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 19:17:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2019-12-27 19:17:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 19:17:06,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:06,759 INFO L411 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:06,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:06,964 INFO L410 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2019-12-27 19:17:06,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:06,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129651322] [2019-12-27 19:17:06,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:07,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129651322] [2019-12-27 19:17:07,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888501173] [2019-12-27 19:17:07,310 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:07,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:07,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:07,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 19:17:07,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:07,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:07,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 19:17:07,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500143671] [2019-12-27 19:17:07,413 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:07,421 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:07,432 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 34 transitions. [2019-12-27 19:17:07,432 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:07,433 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:07,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 19:17:07,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 19:17:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:17:07,435 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 28 states. [2019-12-27 19:17:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:07,484 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2019-12-27 19:17:07,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:17:07,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2019-12-27 19:17:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:07,485 INFO L225 Difference]: With dead ends: 71 [2019-12-27 19:17:07,485 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 19:17:07,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:17:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 19:17:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-27 19:17:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 19:17:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2019-12-27 19:17:07,489 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2019-12-27 19:17:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:07,489 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2019-12-27 19:17:07,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 19:17:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2019-12-27 19:17:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 19:17:07,490 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:07,490 INFO L411 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:07,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:07,693 INFO L410 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:07,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:07,694 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2019-12-27 19:17:07,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:07,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576029240] [2019-12-27 19:17:07,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:08,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576029240] [2019-12-27 19:17:08,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685091833] [2019-12-27 19:17:08,159 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:08,532 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 19:17:08,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:08,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 19:17:08,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:08,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:08,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 19:17:08,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [165012973] [2019-12-27 19:17:08,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:08,569 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:08,578 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 35 transitions. [2019-12-27 19:17:08,578 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:08,578 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:08,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 19:17:08,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 19:17:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:17:08,580 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 29 states. [2019-12-27 19:17:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:08,633 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2019-12-27 19:17:08,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:17:08,633 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 35 [2019-12-27 19:17:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:08,634 INFO L225 Difference]: With dead ends: 72 [2019-12-27 19:17:08,634 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 19:17:08,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:17:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 19:17:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 19:17:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:17:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2019-12-27 19:17:08,637 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2019-12-27 19:17:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:08,637 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2019-12-27 19:17:08,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 19:17:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2019-12-27 19:17:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 19:17:08,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:08,638 INFO L411 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:08,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:08,843 INFO L410 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2019-12-27 19:17:08,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:08,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827694331] [2019-12-27 19:17:08,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:09,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827694331] [2019-12-27 19:17:09,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282502304] [2019-12-27 19:17:09,292 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:12,294 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-12-27 19:17:12,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:12,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 19:17:12,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:12,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:12,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 19:17:12,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1639964309] [2019-12-27 19:17:12,316 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:12,324 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:12,365 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 36 transitions. [2019-12-27 19:17:12,365 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:12,366 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:12,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 19:17:12,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 19:17:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:17:12,367 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 30 states. [2019-12-27 19:17:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:12,416 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2019-12-27 19:17:12,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:17:12,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2019-12-27 19:17:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:12,417 INFO L225 Difference]: With dead ends: 73 [2019-12-27 19:17:12,417 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 19:17:12,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:17:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 19:17:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-12-27 19:17:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-12-27 19:17:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2019-12-27 19:17:12,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2019-12-27 19:17:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:12,423 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2019-12-27 19:17:12,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 19:17:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2019-12-27 19:17:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 19:17:12,423 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:12,423 INFO L411 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:12,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:12,629 INFO L410 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2019-12-27 19:17:12,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:12,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784758988] [2019-12-27 19:17:12,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:13,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784758988] [2019-12-27 19:17:13,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464757708] [2019-12-27 19:17:13,041 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 19:17:13,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:13,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:13,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 19:17:13,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252200755] [2019-12-27 19:17:13,127 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:13,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:13,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 37 transitions. [2019-12-27 19:17:13,150 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:13,150 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:13,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 19:17:13,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 19:17:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:17:13,151 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 31 states. [2019-12-27 19:17:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:13,205 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2019-12-27 19:17:13,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:17:13,205 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2019-12-27 19:17:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:13,206 INFO L225 Difference]: With dead ends: 74 [2019-12-27 19:17:13,206 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 19:17:13,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:17:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 19:17:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 19:17:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 19:17:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2019-12-27 19:17:13,209 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2019-12-27 19:17:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:13,209 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2019-12-27 19:17:13,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 19:17:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2019-12-27 19:17:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 19:17:13,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:13,210 INFO L411 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:13,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,413 INFO L410 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2019-12-27 19:17:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:13,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627980818] [2019-12-27 19:17:13,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:13,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627980818] [2019-12-27 19:17:13,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731561437] [2019-12-27 19:17:13,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:13,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:13,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 19:17:13,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:13,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:13,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 19:17:13,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1524728019] [2019-12-27 19:17:13,993 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:14,016 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:14,030 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 38 transitions. [2019-12-27 19:17:14,031 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:14,031 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:14,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 19:17:14,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 19:17:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:17:14,032 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 32 states. [2019-12-27 19:17:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:14,082 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2019-12-27 19:17:14,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:17:14,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2019-12-27 19:17:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:14,084 INFO L225 Difference]: With dead ends: 75 [2019-12-27 19:17:14,085 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 19:17:14,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:17:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 19:17:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-12-27 19:17:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:17:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2019-12-27 19:17:14,087 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2019-12-27 19:17:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:14,089 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2019-12-27 19:17:14,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 19:17:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2019-12-27 19:17:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 19:17:14,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:14,090 INFO L411 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:14,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:14,294 INFO L410 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2019-12-27 19:17:14,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:14,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005626308] [2019-12-27 19:17:14,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:14,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005626308] [2019-12-27 19:17:14,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5011126] [2019-12-27 19:17:14,758 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-27 19:17:15,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:15,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 19:17:15,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:15,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:15,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 19:17:15,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1652096286] [2019-12-27 19:17:15,977 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:15,987 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:16,001 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 39 transitions. [2019-12-27 19:17:16,001 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:16,001 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:16,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 19:17:16,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 19:17:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:17:16,002 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 33 states. [2019-12-27 19:17:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:16,057 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-12-27 19:17:16,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:17:16,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 39 [2019-12-27 19:17:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:16,058 INFO L225 Difference]: With dead ends: 76 [2019-12-27 19:17:16,058 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 19:17:16,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:17:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 19:17:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 19:17:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:17:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2019-12-27 19:17:16,062 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2019-12-27 19:17:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:16,062 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2019-12-27 19:17:16,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 19:17:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2019-12-27 19:17:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 19:17:16,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:16,063 INFO L411 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:16,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:16,269 INFO L410 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2019-12-27 19:17:16,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:16,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39734177] [2019-12-27 19:17:16,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:16,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39734177] [2019-12-27 19:17:16,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525909137] [2019-12-27 19:17:16,763 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:16,829 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:16,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:16,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 19:17:16,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:16,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:16,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 19:17:16,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [283482170] [2019-12-27 19:17:16,852 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:16,858 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:16,871 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 40 transitions. [2019-12-27 19:17:16,871 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:16,871 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:16,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 19:17:16,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 19:17:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:17:16,872 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 34 states. [2019-12-27 19:17:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:16,925 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2019-12-27 19:17:16,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:17:16,928 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 40 [2019-12-27 19:17:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:16,929 INFO L225 Difference]: With dead ends: 77 [2019-12-27 19:17:16,929 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 19:17:16,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:17:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 19:17:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-27 19:17:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 19:17:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2019-12-27 19:17:16,932 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2019-12-27 19:17:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:16,932 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2019-12-27 19:17:16,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 19:17:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2019-12-27 19:17:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 19:17:16,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:16,933 INFO L411 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:17,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:17,136 INFO L410 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2019-12-27 19:17:17,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:17,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236662590] [2019-12-27 19:17:17,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:17,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236662590] [2019-12-27 19:17:17,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801881761] [2019-12-27 19:17:17,956 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:19,962 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 19:17:19,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:19,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 19:17:19,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:19,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:19,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 19:17:19,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1808541489] [2019-12-27 19:17:19,982 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:19,991 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:20,008 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 41 transitions. [2019-12-27 19:17:20,009 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:20,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:20,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 19:17:20,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 19:17:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:17:20,012 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 35 states. [2019-12-27 19:17:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:20,069 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2019-12-27 19:17:20,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:17:20,070 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2019-12-27 19:17:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:20,070 INFO L225 Difference]: With dead ends: 78 [2019-12-27 19:17:20,070 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 19:17:20,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:17:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 19:17:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 19:17:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 19:17:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2019-12-27 19:17:20,074 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2019-12-27 19:17:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:20,074 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2019-12-27 19:17:20,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 19:17:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2019-12-27 19:17:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 19:17:20,074 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:20,075 INFO L411 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:20,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,277 INFO L410 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:20,278 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2019-12-27 19:17:20,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:20,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724723099] [2019-12-27 19:17:20,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:20,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724723099] [2019-12-27 19:17:20,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305936487] [2019-12-27 19:17:20,787 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:37,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-12-27 19:17:37,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:37,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 19:17:37,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:37,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:37,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 19:17:37,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [448621688] [2019-12-27 19:17:37,549 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:37,558 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:37,578 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 42 transitions. [2019-12-27 19:17:37,578 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:37,579 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:37,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 19:17:37,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:37,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 19:17:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:17:37,580 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 36 states. [2019-12-27 19:17:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:37,639 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2019-12-27 19:17:37,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:17:37,640 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 42 [2019-12-27 19:17:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:37,640 INFO L225 Difference]: With dead ends: 79 [2019-12-27 19:17:37,641 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 19:17:37,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:17:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 19:17:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-27 19:17:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-27 19:17:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2019-12-27 19:17:37,644 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2019-12-27 19:17:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:37,644 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2019-12-27 19:17:37,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 19:17:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2019-12-27 19:17:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 19:17:37,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:37,645 INFO L411 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:37,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:37,855 INFO L410 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2019-12-27 19:17:37,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:37,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263375553] [2019-12-27 19:17:37,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:38,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263375553] [2019-12-27 19:17:38,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582062842] [2019-12-27 19:17:38,549 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:38,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 19:17:38,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:38,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:38,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 19:17:38,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1012776131] [2019-12-27 19:17:38,633 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:38,643 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:38,664 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 43 transitions. [2019-12-27 19:17:38,664 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:38,665 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:38,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 19:17:38,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:38,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 19:17:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:17:38,666 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 37 states. [2019-12-27 19:17:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:38,713 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2019-12-27 19:17:38,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:17:38,713 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 43 [2019-12-27 19:17:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:38,714 INFO L225 Difference]: With dead ends: 80 [2019-12-27 19:17:38,714 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 19:17:38,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:17:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 19:17:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 19:17:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:17:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2019-12-27 19:17:38,720 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2019-12-27 19:17:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:38,720 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2019-12-27 19:17:38,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 19:17:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2019-12-27 19:17:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 19:17:38,722 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:38,722 INFO L411 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:38,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:38,927 INFO L410 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2019-12-27 19:17:38,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:38,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233904452] [2019-12-27 19:17:38,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:39,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233904452] [2019-12-27 19:17:39,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470139928] [2019-12-27 19:17:39,725 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:39,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:39,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:39,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 19:17:39,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:39,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:39,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 19:17:39,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [27882205] [2019-12-27 19:17:39,806 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:39,816 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:39,837 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 44 transitions. [2019-12-27 19:17:39,837 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:39,838 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:39,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 19:17:39,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 19:17:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:17:39,839 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 38 states. [2019-12-27 19:17:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:39,895 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-12-27 19:17:39,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:17:39,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 44 [2019-12-27 19:17:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:39,896 INFO L225 Difference]: With dead ends: 81 [2019-12-27 19:17:39,896 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 19:17:39,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:17:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 19:17:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-27 19:17:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 19:17:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2019-12-27 19:17:39,900 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2019-12-27 19:17:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:39,900 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2019-12-27 19:17:39,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 19:17:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2019-12-27 19:17:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 19:17:39,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:39,901 INFO L411 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:40,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:40,101 INFO L410 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2019-12-27 19:17:40,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:40,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816857546] [2019-12-27 19:17:40,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:40,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816857546] [2019-12-27 19:17:40,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158266407] [2019-12-27 19:17:40,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-12-27 19:17:41,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:41,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 19:17:41,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:41,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:41,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 19:17:41,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1513879226] [2019-12-27 19:17:41,581 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:41,618 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:41,642 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 45 transitions. [2019-12-27 19:17:41,642 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:41,643 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:41,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 19:17:41,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 19:17:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:17:41,644 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 39 states. [2019-12-27 19:17:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:41,706 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2019-12-27 19:17:41,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:17:41,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2019-12-27 19:17:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:41,707 INFO L225 Difference]: With dead ends: 82 [2019-12-27 19:17:41,708 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 19:17:41,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:17:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 19:17:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 19:17:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 19:17:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2019-12-27 19:17:41,712 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2019-12-27 19:17:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:41,712 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2019-12-27 19:17:41,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 19:17:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2019-12-27 19:17:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 19:17:41,713 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:41,714 INFO L411 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:41,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,920 INFO L410 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2019-12-27 19:17:41,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:41,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883020434] [2019-12-27 19:17:41,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:42,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883020434] [2019-12-27 19:17:42,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950629116] [2019-12-27 19:17:42,689 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:42,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:42,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:42,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 19:17:42,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:42,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:42,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 19:17:42,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [40816616] [2019-12-27 19:17:42,778 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:42,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:42,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 46 transitions. [2019-12-27 19:17:42,811 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:42,811 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:42,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 19:17:42,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 19:17:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:17:42,813 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 40 states. [2019-12-27 19:17:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:42,871 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2019-12-27 19:17:42,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:17:42,872 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 46 [2019-12-27 19:17:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:42,873 INFO L225 Difference]: With dead ends: 83 [2019-12-27 19:17:42,873 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 19:17:42,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:17:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 19:17:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-27 19:17:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 19:17:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2019-12-27 19:17:42,877 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2019-12-27 19:17:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:42,878 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2019-12-27 19:17:42,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 19:17:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2019-12-27 19:17:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 19:17:42,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:42,879 INFO L411 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:43,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:43,083 INFO L410 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2019-12-27 19:17:43,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:43,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857357783] [2019-12-27 19:17:43,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:43,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857357783] [2019-12-27 19:17:43,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182155730] [2019-12-27 19:17:43,767 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,314 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 19:17:45,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:45,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 19:17:45,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:45,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:45,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 19:17:45,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947730910] [2019-12-27 19:17:45,353 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:45,359 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:45,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 47 transitions. [2019-12-27 19:17:45,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:45,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:45,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 19:17:45,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 19:17:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:17:45,381 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 41 states. [2019-12-27 19:17:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:45,447 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2019-12-27 19:17:45,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:17:45,448 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 47 [2019-12-27 19:17:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:45,448 INFO L225 Difference]: With dead ends: 84 [2019-12-27 19:17:45,449 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 19:17:45,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:17:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 19:17:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 19:17:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 19:17:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2019-12-27 19:17:45,452 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2019-12-27 19:17:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:45,452 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2019-12-27 19:17:45,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 19:17:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2019-12-27 19:17:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 19:17:45,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:45,453 INFO L411 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:17:45,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,654 INFO L410 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:17:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2019-12-27 19:17:45,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:45,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309052262] [2019-12-27 19:17:45,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:17:46,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309052262] [2019-12-27 19:17:46,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747032985] [2019-12-27 19:17:46,343 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:19,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-27 19:18:19,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:19,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 19:18:19,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:19,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:19,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 19:18:19,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1389282010] [2019-12-27 19:18:19,772 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:19,780 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:19,809 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 48 transitions. [2019-12-27 19:18:19,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:19,810 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:19,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 19:18:19,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 19:18:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:18:19,812 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 42 states. [2019-12-27 19:18:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:19,879 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2019-12-27 19:18:19,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:18:19,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 48 [2019-12-27 19:18:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:19,880 INFO L225 Difference]: With dead ends: 85 [2019-12-27 19:18:19,880 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:18:19,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:18:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:18:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-12-27 19:18:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:18:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2019-12-27 19:18:19,883 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2019-12-27 19:18:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:19,884 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2019-12-27 19:18:19,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 19:18:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2019-12-27 19:18:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-27 19:18:19,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:19,885 INFO L411 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:20,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:20,096 INFO L410 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2019-12-27 19:18:20,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:20,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19135387] [2019-12-27 19:18:20,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:21,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19135387] [2019-12-27 19:18:21,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165375540] [2019-12-27 19:18:21,156 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:21,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 19:18:21,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:21,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:21,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-27 19:18:21,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215137838] [2019-12-27 19:18:21,272 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:21,280 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:21,313 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 49 transitions. [2019-12-27 19:18:21,313 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:21,313 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:21,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 19:18:21,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 19:18:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:18:21,316 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 43 states. [2019-12-27 19:18:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:21,398 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-12-27 19:18:21,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:18:21,399 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-12-27 19:18:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:21,400 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:18:21,400 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:18:21,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:18:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:18:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 19:18:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 19:18:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2019-12-27 19:18:21,403 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2019-12-27 19:18:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:21,404 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2019-12-27 19:18:21,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 19:18:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2019-12-27 19:18:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-27 19:18:21,404 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:21,405 INFO L411 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:21,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:21,608 INFO L410 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2019-12-27 19:18:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:21,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518207544] [2019-12-27 19:18:21,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:22,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518207544] [2019-12-27 19:18:22,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138671511] [2019-12-27 19:18:22,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:22,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:22,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:22,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 19:18:22,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:22,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:22,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-27 19:18:22,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [78490903] [2019-12-27 19:18:22,522 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:22,531 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:22,600 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 50 transitions. [2019-12-27 19:18:22,600 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:22,600 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:22,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-27 19:18:22,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-27 19:18:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:18:22,602 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 44 states. [2019-12-27 19:18:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:22,669 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2019-12-27 19:18:22,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 19:18:22,669 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 50 [2019-12-27 19:18:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:22,670 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:18:22,670 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:18:22,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:18:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:18:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-12-27 19:18:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 19:18:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2019-12-27 19:18:22,674 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2019-12-27 19:18:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:22,674 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2019-12-27 19:18:22,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-27 19:18:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2019-12-27 19:18:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-27 19:18:22,675 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:22,675 INFO L411 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:22,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:22,879 INFO L410 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2019-12-27 19:18:22,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:22,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005263225] [2019-12-27 19:18:22,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005263225] [2019-12-27 19:18:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973998054] [2019-12-27 19:18:23,811 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:31,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-27 19:18:31,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:31,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 19:18:31,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:31,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:31,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-27 19:18:31,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1661720347] [2019-12-27 19:18:31,183 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:31,189 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:31,214 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 51 transitions. [2019-12-27 19:18:31,214 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:31,214 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:31,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-27 19:18:31,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-27 19:18:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:18:31,215 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 45 states. [2019-12-27 19:18:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:31,282 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2019-12-27 19:18:31,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 19:18:31,282 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 51 [2019-12-27 19:18:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:31,283 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:18:31,283 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 19:18:31,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:18:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 19:18:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 19:18:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:18:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2019-12-27 19:18:31,287 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2019-12-27 19:18:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:31,287 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2019-12-27 19:18:31,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-27 19:18:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2019-12-27 19:18:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 19:18:31,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:31,288 INFO L411 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:31,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:31,497 INFO L410 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2019-12-27 19:18:31,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:31,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757882345] [2019-12-27 19:18:31,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:32,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757882345] [2019-12-27 19:18:32,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70789434] [2019-12-27 19:18:32,325 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:32,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:32,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:32,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-27 19:18:32,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:32,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:32,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-12-27 19:18:32,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1274499302] [2019-12-27 19:18:32,415 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:32,424 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:32,450 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 52 transitions. [2019-12-27 19:18:32,451 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:32,451 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:32,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-27 19:18:32,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-27 19:18:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:18:32,452 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 46 states. [2019-12-27 19:18:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:32,542 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2019-12-27 19:18:32,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 19:18:32,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 52 [2019-12-27 19:18:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:32,543 INFO L225 Difference]: With dead ends: 89 [2019-12-27 19:18:32,543 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 19:18:32,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 19:18:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 19:18:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-12-27 19:18:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:18:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2019-12-27 19:18:32,551 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2019-12-27 19:18:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:32,552 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-12-27 19:18:32,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-27 19:18:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2019-12-27 19:18:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-27 19:18:32,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:32,555 INFO L411 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:32,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:32,760 INFO L410 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2019-12-27 19:18:32,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:32,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251126829] [2019-12-27 19:18:32,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:33,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251126829] [2019-12-27 19:18:33,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936944672] [2019-12-27 19:18:33,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:35,701 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-12-27 19:18:35,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:35,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-27 19:18:35,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:35,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:35,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-12-27 19:18:35,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867007052] [2019-12-27 19:18:35,724 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:35,731 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:35,758 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 54 states and 53 transitions. [2019-12-27 19:18:35,759 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:35,759 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:35,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-27 19:18:35,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-27 19:18:35,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:18:35,760 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 47 states. [2019-12-27 19:18:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:35,836 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2019-12-27 19:18:35,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 19:18:35,837 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2019-12-27 19:18:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:35,838 INFO L225 Difference]: With dead ends: 90 [2019-12-27 19:18:35,838 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 19:18:35,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 19:18:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 19:18:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 19:18:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 19:18:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2019-12-27 19:18:35,841 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2019-12-27 19:18:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:35,841 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2019-12-27 19:18:35,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-27 19:18:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2019-12-27 19:18:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-27 19:18:35,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:35,842 INFO L411 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:18:36,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:36,043 INFO L410 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:18:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2019-12-27 19:18:36,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:36,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268388312] [2019-12-27 19:18:36,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:18:36,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268388312] [2019-12-27 19:18:36,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461334242] [2019-12-27 19:18:36,963 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-27 19:20:48,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:48,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-27 19:20:48,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:48,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:48,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-12-27 19:20:48,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1250011539] [2019-12-27 19:20:48,794 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:48,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:48,833 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 55 states and 54 transitions. [2019-12-27 19:20:48,833 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:48,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:48,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-27 19:20:48,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-27 19:20:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:20:48,835 INFO L87 Difference]: Start difference. First operand 90 states and 136 transitions. Second operand 48 states. [2019-12-27 19:20:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:48,900 INFO L93 Difference]: Finished difference Result 91 states and 137 transitions. [2019-12-27 19:20:48,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 19:20:48,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 54 [2019-12-27 19:20:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:48,902 INFO L225 Difference]: With dead ends: 91 [2019-12-27 19:20:48,902 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 19:20:48,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:20:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 19:20:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-12-27 19:20:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 19:20:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 137 transitions. [2019-12-27 19:20:48,905 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 137 transitions. Word has length 54 [2019-12-27 19:20:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:48,906 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 137 transitions. [2019-12-27 19:20:48,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-27 19:20:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 137 transitions. [2019-12-27 19:20:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-27 19:20:48,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:48,907 INFO L411 BasicCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:20:49,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:49,108 INFO L410 AbstractCegarLoop]: === Iteration 49 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:20:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -13736305, now seen corresponding path program 43 times [2019-12-27 19:20:49,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:49,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310839100] [2019-12-27 19:20:49,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:50,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310839100] [2019-12-27 19:20:50,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237884385] [2019-12-27 19:20:50,714 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:50,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-27 19:20:50,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:50,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:50,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-12-27 19:20:50,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157355543] [2019-12-27 19:20:50,870 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:50,894 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:50,951 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 56 states and 55 transitions. [2019-12-27 19:20:50,951 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:50,952 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:50,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-12-27 19:20:50,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-12-27 19:20:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:20:50,954 INFO L87 Difference]: Start difference. First operand 91 states and 137 transitions. Second operand 49 states. [2019-12-27 19:20:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:51,071 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2019-12-27 19:20:51,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 19:20:51,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 55 [2019-12-27 19:20:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:51,073 INFO L225 Difference]: With dead ends: 92 [2019-12-27 19:20:51,073 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 19:20:51,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 19:20:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 19:20:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-27 19:20:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 19:20:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 138 transitions. [2019-12-27 19:20:51,079 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 138 transitions. Word has length 55 [2019-12-27 19:20:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:51,079 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 138 transitions. [2019-12-27 19:20:51,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-12-27 19:20:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 138 transitions. [2019-12-27 19:20:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-27 19:20:51,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:51,080 INFO L411 BasicCegarLoop]: trace histogram [47, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:20:51,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:51,286 INFO L410 AbstractCegarLoop]: === Iteration 50 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:20:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1854513960, now seen corresponding path program 44 times [2019-12-27 19:20:51,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:51,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568409276] [2019-12-27 19:20:51,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:52,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568409276] [2019-12-27 19:20:52,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362477373] [2019-12-27 19:20:52,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:53,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:53,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:53,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-27 19:20:53,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:53,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:53,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-12-27 19:20:53,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84233626] [2019-12-27 19:20:53,077 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:53,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:53,135 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 57 states and 56 transitions. [2019-12-27 19:20:53,136 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:53,136 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:53,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-27 19:20:53,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-27 19:20:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:20:53,137 INFO L87 Difference]: Start difference. First operand 92 states and 138 transitions. Second operand 50 states. [2019-12-27 19:20:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:53,213 INFO L93 Difference]: Finished difference Result 93 states and 139 transitions. [2019-12-27 19:20:53,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 19:20:53,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 56 [2019-12-27 19:20:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:53,214 INFO L225 Difference]: With dead ends: 93 [2019-12-27 19:20:53,215 INFO L226 Difference]: Without dead ends: 93 [2019-12-27 19:20:53,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 19:20:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-27 19:20:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-12-27 19:20:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 19:20:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 139 transitions. [2019-12-27 19:20:53,217 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 139 transitions. Word has length 56 [2019-12-27 19:20:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:53,218 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 139 transitions. [2019-12-27 19:20:53,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-27 19:20:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 139 transitions. [2019-12-27 19:20:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-27 19:20:53,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:53,219 INFO L411 BasicCegarLoop]: trace histogram [48, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 19:20:53,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:53,422 INFO L410 AbstractCegarLoop]: === Iteration 51 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 19:20:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1210920879, now seen corresponding path program 45 times [2019-12-27 19:20:53,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:53,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348187975] [2019-12-27 19:20:53,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 19:20:55,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348187975] [2019-12-27 19:20:55,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975953712] [2019-12-27 19:20:55,003 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown