/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-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:14,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:14,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:14,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:14,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:14,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:14,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:14,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:14,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:14,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:14,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:14,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:14,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:14,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:14,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:14,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:14,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:14,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:14,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:14,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:14,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:14,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:14,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:14,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:14,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:14,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:14,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:14,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:14,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:14,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:14,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:14,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:14,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:14,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:14,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:14,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:14,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:14,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:14,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:14,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:14,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:14,485 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-SemanticLbe-MCR.epf [2019-12-27 15:07:14,505 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:14,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:14,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:14,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:14,509 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:14,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:14,509 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:14,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:14,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:14,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:14,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:14,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:14,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:14,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:14,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:14,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:14,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:14,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:14,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:14,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:14,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:14,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:14,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:14,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:14,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:14,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:14,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:14,515 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:14,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:14,516 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:14,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:07:14,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:07:14,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:14,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:14,812 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:07:14,812 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:07:14,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2019-12-27 15:07:14,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322378f73/84119034fb514a8da8e23b69d8146e48/FLAG54d251c78 [2019-12-27 15:07:15,385 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:15,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2019-12-27 15:07:15,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322378f73/84119034fb514a8da8e23b69d8146e48/FLAG54d251c78 [2019-12-27 15:07:15,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322378f73/84119034fb514a8da8e23b69d8146e48 [2019-12-27 15:07:15,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:15,730 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:15,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:15,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:15,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:15,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36036b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:15, skipping insertion in model container [2019-12-27 15:07:15,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:15" (1/1) ... [2019-12-27 15:07:15,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:15,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:16,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:16,459 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:16,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:16,659 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:16,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16 WrapperNode [2019-12-27 15:07:16,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:16,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:16,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:16,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:16,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:16,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:16,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:16,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:16,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (1/1) ... [2019-12-27 15:07:16,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:16,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:16,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:16,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:16,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (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 15:07:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-27 15:07:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2019-12-27 15:07:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2019-12-27 15:07:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-27 15:07:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:16,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:16,886 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 15:07:17,396 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:17,397 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-12-27 15:07:17,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:17 BoogieIcfgContainer [2019-12-27 15:07:17,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:17,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:17,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:17,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:15" (1/3) ... [2019-12-27 15:07:17,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c4172f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:17, skipping insertion in model container [2019-12-27 15:07:17,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:16" (2/3) ... [2019-12-27 15:07:17,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c4172f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:17, skipping insertion in model container [2019-12-27 15:07:17,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:17" (3/3) ... [2019-12-27 15:07:17,408 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2019-12-27 15:07:17,418 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:17,418 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:17,426 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:17,427 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:17,456 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,457 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,457 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,457 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,458 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,458 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,458 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,459 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,459 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,459 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,459 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,460 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,460 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,461 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,461 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,461 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,461 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,462 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,462 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,462 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,462 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,463 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,463 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,463 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,463 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,464 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,464 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,464 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,465 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,465 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,465 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,465 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,465 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,466 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,466 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,466 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,468 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,468 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,468 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,468 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,469 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,469 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,469 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,469 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,470 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,470 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,470 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,470 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,471 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,471 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,471 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,471 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,472 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,472 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,472 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,472 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,473 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,473 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,473 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,473 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,487 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,488 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,488 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,488 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,488 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,488 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,489 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,489 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,489 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,489 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,490 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,490 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,490 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,490 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,491 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,491 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,491 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,491 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,491 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,492 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,495 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,496 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,496 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,496 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,496 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,497 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,497 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,497 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,497 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,498 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,498 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,498 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,498 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,498 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,499 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,499 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,499 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,499 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,499 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,500 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,500 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,500 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,500 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,500 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,501 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:17,521 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:17,541 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:17,542 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:17,542 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:17,542 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:17,542 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:17,542 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:17,542 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:17,542 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:17,559 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions [2019-12-27 15:07:17,561 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 15:07:17,623 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 15:07:17,624 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 15:07:17,633 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 15:07:17,639 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 15:07:17,677 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 15:07:17,678 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 15:07:17,682 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 15:07:17,687 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2019-12-27 15:07:17,689 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:19,924 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-12-27 15:07:20,115 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2019-12-27 15:07:20,115 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2019-12-27 15:07:20,119 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 25 transitions [2019-12-27 15:07:20,129 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2019-12-27 15:07:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-12-27 15:07:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:20,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,140 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,140 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2019-12-27 15:07:20,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978169616] [2019-12-27 15:07:20,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,344 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 15:07:20,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978169616] [2019-12-27 15:07:20,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:20,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:20,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621818402] [2019-12-27 15:07:20,349 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,358 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,388 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:20,388 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,394 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:20,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:20,412 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2019-12-27 15:07:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,473 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2019-12-27 15:07:20,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:20,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-27 15:07:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,489 INFO L225 Difference]: With dead ends: 61 [2019-12-27 15:07:20,489 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 15:07:20,490 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 15:07:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 15:07:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 15:07:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 15:07:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 15:07:20,527 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2019-12-27 15:07:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,527 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 15:07:20,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 15:07:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:20,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,528 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,529 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2019-12-27 15:07:20,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99413599] [2019-12-27 15:07:20,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,601 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 15:07:20,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99413599] [2019-12-27 15:07:20,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736245911] [2019-12-27 15:07:20,602 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 15:07:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,715 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 15:07:20,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-27 15:07:20,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1538174822] [2019-12-27 15:07:20,717 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,718 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,721 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:20,721 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,721 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:20,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:20,723 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 4 states. [2019-12-27 15:07:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,747 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2019-12-27 15:07:20,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:20,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-27 15:07:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,749 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:07:20,749 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 15:07:20,750 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 15:07:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 15:07:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 15:07:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 15:07:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2019-12-27 15:07:20,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2019-12-27 15:07:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,757 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2019-12-27 15:07:20,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2019-12-27 15:07:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:20,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,758 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,964 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2019-12-27 15:07:20,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432747972] [2019-12-27 15:07:20,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,081 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 15:07:21,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432747972] [2019-12-27 15:07:21,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926036519] [2019-12-27 15:07:21,082 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 15:07:21,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-27 15:07:21,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,252 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 15:07:21,254 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 15:07:21,265 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 15:07:21,266 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 15:07:21,266 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-27 15:07:21,307 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 15:07:21,308 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-12-27 15:07:21,309 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 15:07:21,326 INFO L614 ElimStorePlain]: treesize reduction 16, result has 52.9 percent of original size [2019-12-27 15:07:21,328 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-27 15:07:21,328 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-12-27 15:07:21,371 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 15:07:21,372 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 15:07:21,376 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 15:07:21,376 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 15:07:21,376 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-27 15:07:21,390 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 15:07:21,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:21,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2019-12-27 15:07:21,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [351600876] [2019-12-27 15:07:21,391 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,392 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,394 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:21,395 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,399 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:21,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:21,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:21,400 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2019-12-27 15:07:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,659 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 15:07:21,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:07:21,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-27 15:07:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,663 INFO L225 Difference]: With dead ends: 65 [2019-12-27 15:07:21,663 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:21,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2019-12-27 15:07:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 15:07:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 15:07:21,672 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2019-12-27 15:07:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,673 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 15:07:21,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 15:07:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,674 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,674 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,878 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2019-12-27 15:07:21,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504461962] [2019-12-27 15:07:21,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,932 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 15:07:21,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504461962] [2019-12-27 15:07:21,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739131711] [2019-12-27 15:07:21,933 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 15:07:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,001 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 15:07:22,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 15:07:22,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662683605] [2019-12-27 15:07:22,002 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,003 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,005 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:22,005 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,005 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:22,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:22,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:07:22,006 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 5 states. [2019-12-27 15:07:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,025 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2019-12-27 15:07:22,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:22,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-27 15:07:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,027 INFO L225 Difference]: With dead ends: 53 [2019-12-27 15:07:22,027 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 15:07:22,027 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 15:07:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 15:07:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 15:07:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 15:07:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2019-12-27 15:07:22,033 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2019-12-27 15:07:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,034 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2019-12-27 15:07:22,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2019-12-27 15:07:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:22,035 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,035 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2019-12-27 15:07:22,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575964744] [2019-12-27 15:07:22,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,354 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 15:07:22,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575964744] [2019-12-27 15:07:22,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732779322] [2019-12-27 15:07:22,355 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 15:07:22,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:22,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,433 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 15:07:22,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:07:22,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1955568005] [2019-12-27 15:07:22,436 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,437 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,439 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:22,439 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,440 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:22,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:22,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:07:22,441 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 6 states. [2019-12-27 15:07:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,462 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2019-12-27 15:07:22,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:22,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-27 15:07:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,464 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:22,464 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 15:07:22,465 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 15:07:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 15:07:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 15:07:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 15:07:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2019-12-27 15:07:22,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2019-12-27 15:07:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,470 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2019-12-27 15:07:22,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2019-12-27 15:07:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:22,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,471 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,675 INFO L410 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2019-12-27 15:07:22,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082433384] [2019-12-27 15:07:22,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,758 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 15:07:22,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082433384] [2019-12-27 15:07:22,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369121323] [2019-12-27 15:07:22,758 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 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 15:07:22,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:22,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,919 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 15:07:22,919 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 15:07:22,926 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 15:07:22,942 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 15:07:22,943 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-12-27 15:07:22,968 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 15:07:22,968 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 15:07:22,971 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 15:07:22,972 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 15:07:22,972 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-27 15:07:22,984 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 15:07:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2019-12-27 15:07:22,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1095186687] [2019-12-27 15:07:22,986 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,987 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,992 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 15:07:22,992 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,993 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:22,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:22,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:22,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:22,994 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2019-12-27 15:07:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,198 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 15:07:23,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:23,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 15:07:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,200 INFO L225 Difference]: With dead ends: 74 [2019-12-27 15:07:23,200 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 15:07:23,201 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 15:07:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 15:07:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2019-12-27 15:07:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 15:07:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2019-12-27 15:07:23,207 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2019-12-27 15:07:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,207 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2019-12-27 15:07:23,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2019-12-27 15:07:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:23,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,208 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,411 INFO L410 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2019-12-27 15:07:23,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537050705] [2019-12-27 15:07:23,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,464 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 15:07:23,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537050705] [2019-12-27 15:07:23,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745294974] [2019-12-27 15:07:23,464 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 15:07:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,544 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 15:07:23,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 15:07:23,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [463398405] [2019-12-27 15:07:23,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 15:07:23,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,550 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:23,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:23,551 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 7 states. [2019-12-27 15:07:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,577 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-12-27 15:07:23,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-12-27 15:07:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,579 INFO L225 Difference]: With dead ends: 50 [2019-12-27 15:07:23,579 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:23,579 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 15:07:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 15:07:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:07:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2019-12-27 15:07:23,584 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2019-12-27 15:07:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,584 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2019-12-27 15:07:23,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2019-12-27 15:07:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:07:23,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,585 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,794 INFO L410 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2019-12-27 15:07:23,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656428137] [2019-12-27 15:07:23,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,859 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 15:07:23,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656428137] [2019-12-27 15:07:23,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589657148] [2019-12-27 15:07:23,859 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 15:07:23,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:23,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,928 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 15:07:23,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 15:07:23,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1240193044] [2019-12-27 15:07:23,929 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,930 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,933 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 14 transitions. [2019-12-27 15:07:23,933 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,933 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:23,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:23,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:07:23,934 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 8 states. [2019-12-27 15:07:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,967 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2019-12-27 15:07:23,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:23,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-27 15:07:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,968 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:23,968 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 15:07:23,969 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 15:07:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 15:07:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-27 15:07:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 15:07:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2019-12-27 15:07:23,973 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2019-12-27 15:07:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,973 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2019-12-27 15:07:23,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2019-12-27 15:07:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 15:07:23,974 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,974 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,181 INFO L410 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2019-12-27 15:07:24,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429870588] [2019-12-27 15:07:24,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,282 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 15:07:24,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429870588] [2019-12-27 15:07:24,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527681961] [2019-12-27 15:07:24,283 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 15:07:24,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:24,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,345 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 15:07:24,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 15:07:24,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1790710156] [2019-12-27 15:07:24,346 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,347 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,350 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 15 transitions. [2019-12-27 15:07:24,350 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,350 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:24,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:24,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:24,351 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 9 states. [2019-12-27 15:07:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,376 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2019-12-27 15:07:24,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:24,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-27 15:07:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,377 INFO L225 Difference]: With dead ends: 52 [2019-12-27 15:07:24,377 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 15:07:24,378 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 15:07:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 15:07:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 15:07:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 15:07:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2019-12-27 15:07:24,381 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2019-12-27 15:07:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,382 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2019-12-27 15:07:24,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2019-12-27 15:07:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 15:07:24,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,383 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,590 INFO L410 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,590 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2019-12-27 15:07:24,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158960473] [2019-12-27 15:07:24,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,669 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 15:07:24,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158960473] [2019-12-27 15:07:24,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102552215] [2019-12-27 15:07:24,670 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 15:07:24,732 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:24,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,762 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 15:07:24,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 15:07:24,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [962103499] [2019-12-27 15:07:24,763 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,765 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,768 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 16 transitions. [2019-12-27 15:07:24,768 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,768 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:07:24,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:07:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:24,769 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 10 states. [2019-12-27 15:07:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,795 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2019-12-27 15:07:24,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:07:24,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-27 15:07:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,796 INFO L225 Difference]: With dead ends: 53 [2019-12-27 15:07:24,796 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 15:07:24,796 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 15:07:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 15:07:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 15:07:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 15:07:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2019-12-27 15:07:24,800 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2019-12-27 15:07:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,801 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2019-12-27 15:07:24,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:07:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2019-12-27 15:07:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 15:07:24,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,802 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,007 INFO L410 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:25,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2019-12-27 15:07:25,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769503288] [2019-12-27 15:07:25,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,090 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 15:07:25,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769503288] [2019-12-27 15:07:25,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33660118] [2019-12-27 15:07:25,090 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 15:07:25,146 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 15:07:25,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,159 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 15:07:25,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 15:07:25,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [78753898] [2019-12-27 15:07:25,160 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,162 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,164 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 17 transitions. [2019-12-27 15:07:25,164 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,165 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:07:25,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:07:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:25,166 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 11 states. [2019-12-27 15:07:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,198 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2019-12-27 15:07:25,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:07:25,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-12-27 15:07:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,202 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:25,202 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 15:07:25,202 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 15:07:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 15:07:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 15:07:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 15:07:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2019-12-27 15:07:25,209 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2019-12-27 15:07:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,209 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2019-12-27 15:07:25,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:07:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2019-12-27 15:07:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 15:07:25,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,210 INFO L411 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,415 INFO L410 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2019-12-27 15:07:25,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045035182] [2019-12-27 15:07:25,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,513 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 15:07:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045035182] [2019-12-27 15:07:25,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208877711] [2019-12-27 15:07:25,514 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 15:07:25,599 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 15:07:25,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,613 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 15:07:25,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 15:07:25,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [25580589] [2019-12-27 15:07:25,614 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,616 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,619 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 18 transitions. [2019-12-27 15:07:25,619 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,620 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 15:07:25,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 15:07:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:25,621 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 12 states. [2019-12-27 15:07:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,645 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2019-12-27 15:07:25,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:07:25,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-12-27 15:07:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,646 INFO L225 Difference]: With dead ends: 55 [2019-12-27 15:07:25,646 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:07:25,646 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 15:07:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:07:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-12-27 15:07:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2019-12-27 15:07:25,650 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2019-12-27 15:07:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,650 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2019-12-27 15:07:25,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 15:07:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2019-12-27 15:07:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 15:07:25,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,651 INFO L411 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,855 INFO L410 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2019-12-27 15:07:25,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700054994] [2019-12-27 15:07:25,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,048 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 15:07:26,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700054994] [2019-12-27 15:07:26,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501410152] [2019-12-27 15:07:26,049 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 15:07:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:26,128 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 15:07:26,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:26,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 15:07:26,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1758232722] [2019-12-27 15:07:26,129 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:26,131 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:26,134 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 19 transitions. [2019-12-27 15:07:26,135 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:26,135 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:26,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 15:07:26,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 15:07:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:26,136 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 13 states. [2019-12-27 15:07:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:26,182 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2019-12-27 15:07:26,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:07:26,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-12-27 15:07:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:26,183 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:07:26,183 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 15:07:26,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 15:07:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 15:07:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 15:07:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2019-12-27 15:07:26,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2019-12-27 15:07:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:26,187 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2019-12-27 15:07:26,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 15:07:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2019-12-27 15:07:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 15:07:26,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:26,188 INFO L411 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,393 INFO L410 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2019-12-27 15:07:26,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987476287] [2019-12-27 15:07:26,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,632 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 15:07:26,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987476287] [2019-12-27 15:07:26,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721289733] [2019-12-27 15:07:26,633 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 15:07:26,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:26,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:26,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:26,785 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 15:07:26,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:26,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 15:07:26,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015278296] [2019-12-27 15:07:26,786 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:26,788 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:26,792 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 20 transitions. [2019-12-27 15:07:26,792 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:26,793 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:26,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 15:07:26,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 15:07:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:26,794 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 14 states. [2019-12-27 15:07:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:26,826 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2019-12-27 15:07:26,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 15:07:26,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2019-12-27 15:07:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:26,828 INFO L225 Difference]: With dead ends: 57 [2019-12-27 15:07:26,828 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 15:07:26,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 15:07:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-27 15:07:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 15:07:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2019-12-27 15:07:26,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2019-12-27 15:07:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:26,832 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2019-12-27 15:07:26,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 15:07:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2019-12-27 15:07:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 15:07:26,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:26,834 INFO L411 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,038 INFO L410 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2019-12-27 15:07:27,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608692401] [2019-12-27 15:07:27,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,184 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 15:07:27,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608692401] [2019-12-27 15:07:27,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526699312] [2019-12-27 15:07:27,185 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 15:07:27,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-27 15:07:27,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,323 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 15:07:27,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 15:07:27,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [38256577] [2019-12-27 15:07:27,324 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,327 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,331 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 21 transitions. [2019-12-27 15:07:27,331 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,331 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 15:07:27,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 15:07:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:27,333 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 15 states. [2019-12-27 15:07:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,368 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2019-12-27 15:07:27,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 15:07:27,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2019-12-27 15:07:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,369 INFO L225 Difference]: With dead ends: 58 [2019-12-27 15:07:27,369 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 15:07:27,370 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 15:07:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 15:07:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 15:07:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:07:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2019-12-27 15:07:27,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2019-12-27 15:07:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,373 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2019-12-27 15:07:27,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 15:07:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2019-12-27 15:07:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 15:07:27,374 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,374 INFO L411 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,575 INFO L410 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2019-12-27 15:07:27,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617849619] [2019-12-27 15:07:27,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,714 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 15:07:27,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617849619] [2019-12-27 15:07:27,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614409674] [2019-12-27 15:07:27,714 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 15:07:27,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:27,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,784 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 15:07:27,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 15:07:27,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1789981895] [2019-12-27 15:07:27,785 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,788 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 22 transitions. [2019-12-27 15:07:27,794 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,795 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 15:07:27,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 15:07:27,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:27,796 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 16 states. [2019-12-27 15:07:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,829 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2019-12-27 15:07:27,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 15:07:27,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2019-12-27 15:07:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,833 INFO L225 Difference]: With dead ends: 59 [2019-12-27 15:07:27,834 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 15:07:27,834 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 15:07:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 15:07:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-27 15:07:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:07:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2019-12-27 15:07:27,839 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2019-12-27 15:07:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,839 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2019-12-27 15:07:27,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 15:07:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2019-12-27 15:07:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 15:07:27,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,846 INFO L411 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,047 INFO L410 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2019-12-27 15:07:28,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708635882] [2019-12-27 15:07:28,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,322 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 15:07:28,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708635882] [2019-12-27 15:07:28,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003394524] [2019-12-27 15:07:28,323 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 15:07:28,519 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 15:07:28,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,541 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 15:07:28,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 15:07:28,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1127867550] [2019-12-27 15:07:28,543 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,552 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 23 transitions. [2019-12-27 15:07:28,552 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,553 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 15:07:28,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 15:07:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:28,554 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 17 states. [2019-12-27 15:07:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,581 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2019-12-27 15:07:28,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 15:07:28,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2019-12-27 15:07:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,583 INFO L225 Difference]: With dead ends: 60 [2019-12-27 15:07:28,583 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 15:07:28,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 15:07:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 15:07:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 15:07:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2019-12-27 15:07:28,589 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2019-12-27 15:07:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,589 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2019-12-27 15:07:28,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 15:07:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2019-12-27 15:07:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 15:07:28,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,590 INFO L411 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,797 INFO L410 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2019-12-27 15:07:28,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047180952] [2019-12-27 15:07:28,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,991 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 15:07:28,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047180952] [2019-12-27 15:07:28,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021898123] [2019-12-27 15:07:28,991 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 15:07:29,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-27 15:07:29,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,287 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 15:07:29,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 15:07:29,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1164846037] [2019-12-27 15:07:29,288 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,292 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,296 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 24 transitions. [2019-12-27 15:07:29,297 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,297 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 15:07:29,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 15:07:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:29,298 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 18 states. [2019-12-27 15:07:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,335 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2019-12-27 15:07:29,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 15:07:29,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-12-27 15:07:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,336 INFO L225 Difference]: With dead ends: 61 [2019-12-27 15:07:29,337 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 15:07:29,337 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 15:07:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 15:07:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-27 15:07:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-27 15:07:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2019-12-27 15:07:29,340 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2019-12-27 15:07:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,340 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2019-12-27 15:07:29,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 15:07:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2019-12-27 15:07:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 15:07:29,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,341 INFO L411 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,541 INFO L410 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2019-12-27 15:07:29,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289076927] [2019-12-27 15:07:29,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,735 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 15:07:29,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289076927] [2019-12-27 15:07:29,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816222550] [2019-12-27 15:07:29,735 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 15:07:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,822 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 15:07:29,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 15:07:29,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048465304] [2019-12-27 15:07:29,823 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,833 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 25 transitions. [2019-12-27 15:07:29,833 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,833 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 15:07:29,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 15:07:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:29,834 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 19 states. [2019-12-27 15:07:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,864 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2019-12-27 15:07:29,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 15:07:29,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-12-27 15:07:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,866 INFO L225 Difference]: With dead ends: 62 [2019-12-27 15:07:29,866 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:07:29,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:07:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 15:07:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:07:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2019-12-27 15:07:29,869 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2019-12-27 15:07:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,869 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2019-12-27 15:07:29,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 15:07:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2019-12-27 15:07:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 15:07:29,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,870 INFO L411 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,073 INFO L410 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2019-12-27 15:07:30,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553810013] [2019-12-27 15:07:30,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,303 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 15:07:30,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553810013] [2019-12-27 15:07:30,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340833673] [2019-12-27 15:07:30,304 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 15:07:30,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:30,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,384 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 15:07:30,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 15:07:30,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1619264359] [2019-12-27 15:07:30,385 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,396 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 26 transitions. [2019-12-27 15:07:30,396 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,396 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 15:07:30,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 15:07:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:07:30,397 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 20 states. [2019-12-27 15:07:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,433 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2019-12-27 15:07:30,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 15:07:30,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-12-27 15:07:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,435 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:07:30,435 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 15:07:30,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:07:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 15:07:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-27 15:07:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 15:07:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2019-12-27 15:07:30,441 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2019-12-27 15:07:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,441 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2019-12-27 15:07:30,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 15:07:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2019-12-27 15:07:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 15:07:30,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,442 INFO L411 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,645 INFO L410 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2019-12-27 15:07:30,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933407374] [2019-12-27 15:07:30,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,877 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 15:07:30,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933407374] [2019-12-27 15:07:30,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303252405] [2019-12-27 15:07:30,878 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 15:07:31,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-27 15:07:31,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,398 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 15:07:31,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 15:07:31,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1190031428] [2019-12-27 15:07:31,399 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,404 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,411 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 27 transitions. [2019-12-27 15:07:31,411 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 15:07:31,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 15:07:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:07:31,413 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 21 states. [2019-12-27 15:07:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,451 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2019-12-27 15:07:31,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 15:07:31,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2019-12-27 15:07:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,452 INFO L225 Difference]: With dead ends: 64 [2019-12-27 15:07:31,452 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 15:07:31,452 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 15:07:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 15:07:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 15:07:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 15:07:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2019-12-27 15:07:31,454 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2019-12-27 15:07:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,454 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2019-12-27 15:07:31,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 15:07:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2019-12-27 15:07:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 15:07:31,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,455 INFO L411 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,656 INFO L410 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2019-12-27 15:07:31,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201211229] [2019-12-27 15:07:31,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,877 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 15:07:31,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201211229] [2019-12-27 15:07:31,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531161286] [2019-12-27 15:07:31,878 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 15:07:31,957 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:31,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,973 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 15:07:31,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 15:07:31,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549009042] [2019-12-27 15:07:31,974 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,979 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,986 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 28 transitions. [2019-12-27 15:07:31,986 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,987 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 15:07:31,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 15:07:31,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:07:31,988 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 22 states. [2019-12-27 15:07:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,031 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2019-12-27 15:07:32,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 15:07:32,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-12-27 15:07:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,034 INFO L225 Difference]: With dead ends: 65 [2019-12-27 15:07:32,034 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:32,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:07:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-27 15:07:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-27 15:07:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2019-12-27 15:07:32,037 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2019-12-27 15:07:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,037 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2019-12-27 15:07:32,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 15:07:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2019-12-27 15:07:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 15:07:32,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,038 INFO L411 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,239 INFO L410 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2019-12-27 15:07:32,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252186273] [2019-12-27 15:07:32,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,497 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 15:07:32,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252186273] [2019-12-27 15:07:32,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280574973] [2019-12-27 15:07:32,498 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 15:07:32,657 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 15:07:32,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,698 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 15:07:32,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 15:07:32,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489123977] [2019-12-27 15:07:32,699 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,705 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 29 transitions. [2019-12-27 15:07:32,712 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,713 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 15:07:32,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 15:07:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:07:32,714 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 23 states. [2019-12-27 15:07:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,741 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2019-12-27 15:07:32,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 15:07:32,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2019-12-27 15:07:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,742 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:07:32,742 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 15:07:32,742 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 15:07:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 15:07:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 15:07:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 15:07:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2019-12-27 15:07:32,745 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2019-12-27 15:07:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,745 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2019-12-27 15:07:32,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 15:07:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2019-12-27 15:07:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 15:07:32,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,746 INFO L411 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,950 INFO L410 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2019-12-27 15:07:32,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394224152] [2019-12-27 15:07:32,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,223 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 15:07:33,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394224152] [2019-12-27 15:07:33,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959967064] [2019-12-27 15:07:33,223 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 15:07:34,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-27 15:07:34,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,115 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 15:07:34,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 15:07:34,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1210696868] [2019-12-27 15:07:34,116 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,124 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,134 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 30 transitions. [2019-12-27 15:07:34,134 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 15:07:34,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 15:07:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:07:34,136 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 24 states. [2019-12-27 15:07:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,188 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2019-12-27 15:07:34,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 15:07:34,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2019-12-27 15:07:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,190 INFO L225 Difference]: With dead ends: 67 [2019-12-27 15:07:34,190 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:07:34,190 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 15:07:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:07:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-12-27 15:07:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2019-12-27 15:07:34,193 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2019-12-27 15:07:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,193 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2019-12-27 15:07:34,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 15:07:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2019-12-27 15:07:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 15:07:34,194 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,194 INFO L411 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,399 INFO L410 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2019-12-27 15:07:34,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560963962] [2019-12-27 15:07:34,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,827 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 15:07:34,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560963962] [2019-12-27 15:07:34,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789222015] [2019-12-27 15:07:34,828 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 15:07:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,900 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 15:07:34,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 15:07:34,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1872315509] [2019-12-27 15:07:34,901 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,907 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,917 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 31 transitions. [2019-12-27 15:07:34,917 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,917 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 15:07:34,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 15:07:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:07:34,918 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 25 states. [2019-12-27 15:07:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,951 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2019-12-27 15:07:34,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 15:07:34,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2019-12-27 15:07:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,953 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:07:34,953 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:07:34,953 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 15:07:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:07:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 15:07:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 15:07:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2019-12-27 15:07:34,956 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2019-12-27 15:07:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,956 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2019-12-27 15:07:34,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 15:07:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2019-12-27 15:07:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 15:07:34,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,957 INFO L411 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,158 INFO L410 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2019-12-27 15:07:35,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476627245] [2019-12-27 15:07:35,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,470 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 15:07:35,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476627245] [2019-12-27 15:07:35,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845192044] [2019-12-27 15:07:35,471 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 15:07:35,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:35,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,547 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 15:07:35,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 15:07:35,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1232613033] [2019-12-27 15:07:35,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,553 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,561 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 32 transitions. [2019-12-27 15:07:35,561 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,561 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:35,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 15:07:35,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 15:07:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:07:35,562 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 26 states. [2019-12-27 15:07:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,612 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2019-12-27 15:07:35,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 15:07:35,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2019-12-27 15:07:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,612 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:07:35,613 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 15:07:35,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:07:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 15:07:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-27 15:07:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-27 15:07:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2019-12-27 15:07:35,615 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2019-12-27 15:07:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,616 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2019-12-27 15:07:35,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 15:07:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2019-12-27 15:07:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 15:07:35,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,617 INFO L411 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,820 INFO L410 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2019-12-27 15:07:35,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81291437] [2019-12-27 15:07:35,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,198 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 15:07:36,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81291437] [2019-12-27 15:07:36,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838021287] [2019-12-27 15:07:36,199 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 15:07:38,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-12-27 15:07:38,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,045 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 15:07:38,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 15:07:38,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1476437304] [2019-12-27 15:07:38,046 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,052 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,063 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 33 transitions. [2019-12-27 15:07:38,064 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,064 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:38,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 15:07:38,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 15:07:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:07:38,065 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 27 states. [2019-12-27 15:07:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,109 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2019-12-27 15:07:38,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 15:07:38,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2019-12-27 15:07:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,110 INFO L225 Difference]: With dead ends: 70 [2019-12-27 15:07:38,110 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 15:07:38,111 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 15:07:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 15:07:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 15:07:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2019-12-27 15:07:38,112 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2019-12-27 15:07:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,113 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2019-12-27 15:07:38,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 15:07:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2019-12-27 15:07:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 15:07:38,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,114 INFO L411 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,320 INFO L410 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2019-12-27 15:07:38,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21336060] [2019-12-27 15:07:38,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,716 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 15:07:38,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21336060] [2019-12-27 15:07:38,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070426575] [2019-12-27 15:07:38,717 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 15:07:38,784 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:38,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,796 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 15:07:38,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 15:07:38,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [820304466] [2019-12-27 15:07:38,797 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,802 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,816 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 34 transitions. [2019-12-27 15:07:38,817 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,817 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:38,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 15:07:38,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 15:07:38,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-27 15:07:38,818 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 28 states. [2019-12-27 15:07:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,855 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2019-12-27 15:07:38,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 15:07:38,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2019-12-27 15:07:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,857 INFO L225 Difference]: With dead ends: 71 [2019-12-27 15:07:38,857 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 15:07:38,857 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 15:07:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 15:07:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-27 15:07:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2019-12-27 15:07:38,861 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2019-12-27 15:07:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,861 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2019-12-27 15:07:38,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 15:07:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2019-12-27 15:07:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 15:07:38,862 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,862 INFO L411 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,065 INFO L410 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2019-12-27 15:07:39,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220925720] [2019-12-27 15:07:39,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,533 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 15:07:39,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220925720] [2019-12-27 15:07:39,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023539829] [2019-12-27 15:07:39,534 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 15:07:39,780 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 15:07:39,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,795 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 15:07:39,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 15:07:39,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147625852] [2019-12-27 15:07:39,796 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,802 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,812 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 35 transitions. [2019-12-27 15:07:39,812 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:39,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 15:07:39,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 15:07:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-27 15:07:39,814 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 29 states. [2019-12-27 15:07:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,863 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2019-12-27 15:07:39,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 15:07:39,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 35 [2019-12-27 15:07:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,864 INFO L225 Difference]: With dead ends: 72 [2019-12-27 15:07:39,864 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 15:07:39,865 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 15:07:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 15:07:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 15:07:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2019-12-27 15:07:39,869 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2019-12-27 15:07:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,869 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2019-12-27 15:07:39,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 15:07:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2019-12-27 15:07:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 15:07:39,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,870 INFO L411 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,075 INFO L410 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2019-12-27 15:07:40,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198295213] [2019-12-27 15:07:40,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,485 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 15:07:40,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198295213] [2019-12-27 15:07:40,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141373735] [2019-12-27 15:07:40,485 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 15:07:43,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-12-27 15:07:43,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,179 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 15:07:43,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 15:07:43,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [178078612] [2019-12-27 15:07:43,180 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,187 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,232 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 36 transitions. [2019-12-27 15:07:43,233 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,233 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:43,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 15:07:43,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 15:07:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 15:07:43,234 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 30 states. [2019-12-27 15:07:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,292 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2019-12-27 15:07:43,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 15:07:43,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2019-12-27 15:07:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,294 INFO L225 Difference]: With dead ends: 73 [2019-12-27 15:07:43,294 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 15:07:43,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 15:07:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 15:07:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-12-27 15:07:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-12-27 15:07:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2019-12-27 15:07:43,297 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2019-12-27 15:07:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,297 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2019-12-27 15:07:43,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 15:07:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2019-12-27 15:07:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 15:07:43,298 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,298 INFO L411 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,504 INFO L410 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2019-12-27 15:07:43,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000924007] [2019-12-27 15:07:43,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,942 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 15:07:43,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000924007] [2019-12-27 15:07:43,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021107199] [2019-12-27 15:07:43,943 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 15:07:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,026 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 15:07:44,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 15:07:44,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1622078679] [2019-12-27 15:07:44,027 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,035 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,050 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 37 transitions. [2019-12-27 15:07:44,050 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,050 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 15:07:44,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 15:07:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-27 15:07:44,052 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 31 states. [2019-12-27 15:07:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,090 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2019-12-27 15:07:44,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 15:07:44,095 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2019-12-27 15:07:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,096 INFO L225 Difference]: With dead ends: 74 [2019-12-27 15:07:44,096 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 15:07:44,096 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 15:07:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 15:07:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 15:07:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:07:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2019-12-27 15:07:44,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2019-12-27 15:07:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,099 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2019-12-27 15:07:44,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 15:07:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2019-12-27 15:07:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 15:07:44,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,100 INFO L411 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,305 INFO L410 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2019-12-27 15:07:44,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620607862] [2019-12-27 15:07:44,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,743 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 15:07:44,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620607862] [2019-12-27 15:07:44,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113480519] [2019-12-27 15:07:44,744 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 15:07:44,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:44,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,833 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 15:07:44,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 15:07:44,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [742164709] [2019-12-27 15:07:44,834 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,858 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 38 transitions. [2019-12-27 15:07:44,858 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,859 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 15:07:44,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 15:07:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 15:07:44,860 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 32 states. [2019-12-27 15:07:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,916 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2019-12-27 15:07:44,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 15:07:44,917 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2019-12-27 15:07:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,917 INFO L225 Difference]: With dead ends: 75 [2019-12-27 15:07:44,917 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 15:07:44,918 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 15:07:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 15:07:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-12-27 15:07:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 15:07:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2019-12-27 15:07:44,920 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2019-12-27 15:07:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,921 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2019-12-27 15:07:44,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 15:07:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2019-12-27 15:07:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 15:07:44,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,922 INFO L411 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,123 INFO L410 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2019-12-27 15:07:45,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011434487] [2019-12-27 15:07:45,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,579 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 15:07:45,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011434487] [2019-12-27 15:07:45,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32089475] [2019-12-27 15:07:45,580 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 15:07:49,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-27 15:07:49,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,236 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 15:07:49,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 15:07:49,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [643323441] [2019-12-27 15:07:49,237 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,246 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,260 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 39 transitions. [2019-12-27 15:07:49,260 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,260 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 15:07:49,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 15:07:49,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 15:07:49,261 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 33 states. [2019-12-27 15:07:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:49,308 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-12-27 15:07:49,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 15:07:49,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 39 [2019-12-27 15:07:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:49,309 INFO L225 Difference]: With dead ends: 76 [2019-12-27 15:07:49,309 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:07:49,310 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 15:07:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:07:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 15:07:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 15:07:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2019-12-27 15:07:49,313 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2019-12-27 15:07:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:49,313 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2019-12-27 15:07:49,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 15:07:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2019-12-27 15:07:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 15:07:49,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:49,314 INFO L411 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:49,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,520 INFO L410 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2019-12-27 15:07:49,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:49,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631236570] [2019-12-27 15:07:49,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,236 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 15:07:50,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631236570] [2019-12-27 15:07:50,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244559217] [2019-12-27 15:07:50,237 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 15:07:50,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:50,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:50,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:50,365 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 15:07:50,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:50,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 15:07:50,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1040119035] [2019-12-27 15:07:50,366 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:50,385 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:50,409 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 40 transitions. [2019-12-27 15:07:50,410 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:50,410 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:50,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 15:07:50,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:50,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 15:07:50,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 15:07:50,412 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 34 states. [2019-12-27 15:07:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,479 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2019-12-27 15:07:50,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 15:07:50,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 40 [2019-12-27 15:07:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,481 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:07:50,481 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 15:07:50,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 15:07:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 15:07:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-27 15:07:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 15:07:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2019-12-27 15:07:50,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2019-12-27 15:07:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,486 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2019-12-27 15:07:50,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 15:07:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2019-12-27 15:07:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 15:07:50,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,488 INFO L411 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,691 INFO L410 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2019-12-27 15:07:50,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623721739] [2019-12-27 15:07:50,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,213 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 15:07:51,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623721739] [2019-12-27 15:07:51,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567714983] [2019-12-27 15:07:51,214 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 15:07:51,931 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 15:07:51,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:51,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,946 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 15:07:51,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 15:07:51,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1692414807] [2019-12-27 15:07:51,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,954 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,967 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 41 transitions. [2019-12-27 15:07:51,968 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,968 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 15:07:51,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 15:07:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 15:07:51,969 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 35 states. [2019-12-27 15:07:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,027 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2019-12-27 15:07:52,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 15:07:52,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2019-12-27 15:07:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,033 INFO L225 Difference]: With dead ends: 78 [2019-12-27 15:07:52,033 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 15:07:52,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 15:07:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 15:07:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 15:07:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 15:07:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2019-12-27 15:07:52,036 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2019-12-27 15:07:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,037 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2019-12-27 15:07:52,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 15:07:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2019-12-27 15:07:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 15:07:52,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,038 INFO L411 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,241 INFO L410 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2019-12-27 15:07:52,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534670700] [2019-12-27 15:07:52,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,765 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 15:07:52,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534670700] [2019-12-27 15:07:52,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459077853] [2019-12-27 15:07:52,766 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 15:07:57,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-12-27 15:07:57,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,226 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 15:07:57,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 15:07:57,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1772686565] [2019-12-27 15:07:57,227 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,237 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,256 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 42 transitions. [2019-12-27 15:07:57,257 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,257 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 15:07:57,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 15:07:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 15:07:57,258 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 36 states. [2019-12-27 15:07:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,333 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2019-12-27 15:07:57,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 15:07:57,334 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 42 [2019-12-27 15:07:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,335 INFO L225 Difference]: With dead ends: 79 [2019-12-27 15:07:57,335 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:07:57,335 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 15:07:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:07:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-27 15:07:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-27 15:07:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2019-12-27 15:07:57,338 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2019-12-27 15:07:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,338 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2019-12-27 15:07:57,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 15:07:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2019-12-27 15:07:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 15:07:57,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,339 INFO L411 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,546 INFO L410 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:57,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2019-12-27 15:07:57,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253070579] [2019-12-27 15:07:57,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,134 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 15:07:58,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253070579] [2019-12-27 15:07:58,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130449944] [2019-12-27 15:07:58,135 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 15:07:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 15:07:58,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:58,215 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 15:07:58,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:58,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 15:07:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1927947424] [2019-12-27 15:07:58,217 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:58,227 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:58,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 43 transitions. [2019-12-27 15:07:58,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:58,248 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:58,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 15:07:58,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 15:07:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 15:07:58,250 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 37 states. [2019-12-27 15:07:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:58,292 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2019-12-27 15:07:58,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 15:07:58,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 43 [2019-12-27 15:07:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:58,293 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:07:58,294 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:07:58,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 15:07:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:07:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 15:07:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2019-12-27 15:07:58,298 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2019-12-27 15:07:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:58,299 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2019-12-27 15:07:58,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 15:07:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2019-12-27 15:07:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 15:07:58,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:58,300 INFO L411 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:58,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,504 INFO L410 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2019-12-27 15:07:58,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:58,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419541573] [2019-12-27 15:07:58,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,308 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 15:07:59,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419541573] [2019-12-27 15:07:59,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839515438] [2019-12-27 15:07:59,309 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 15:07:59,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:59,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:59,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 15:07:59,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,419 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 15:07:59,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 15:07:59,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1629466021] [2019-12-27 15:07:59,420 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,429 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,450 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 44 transitions. [2019-12-27 15:07:59,450 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,450 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 15:07:59,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 15:07:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 15:07:59,452 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 38 states. [2019-12-27 15:07:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:59,509 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-12-27 15:07:59,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 15:07:59,510 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 44 [2019-12-27 15:07:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:59,511 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:07:59,511 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 15:07:59,511 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 15:07:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 15:07:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-27 15:07:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 15:07:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2019-12-27 15:07:59,513 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2019-12-27 15:07:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:59,513 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2019-12-27 15:07:59,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 15:07:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2019-12-27 15:07:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 15:07:59,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:59,514 INFO L411 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:07:59,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,717 INFO L410 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:07:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:59,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2019-12-27 15:07:59,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:59,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216274699] [2019-12-27 15:07:59,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,300 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 15:08:00,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216274699] [2019-12-27 15:08:00,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715048390] [2019-12-27 15:08:00,300 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 15:08:12,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-12-27 15:08:12,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,529 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 15:08:12,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 15:08:12,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760469710] [2019-12-27 15:08:12,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,541 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,601 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 45 transitions. [2019-12-27 15:08:12,601 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,601 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:12,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 15:08:12,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 15:08:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 15:08:12,603 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 39 states. [2019-12-27 15:08:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:12,660 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2019-12-27 15:08:12,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 15:08:12,660 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 45 [2019-12-27 15:08:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:12,661 INFO L225 Difference]: With dead ends: 82 [2019-12-27 15:08:12,661 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 15:08:12,662 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 15:08:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 15:08:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 15:08:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 15:08:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2019-12-27 15:08:12,664 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2019-12-27 15:08:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:12,665 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2019-12-27 15:08:12,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 15:08:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2019-12-27 15:08:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 15:08:12,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:12,666 INFO L411 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,866 INFO L410 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:08:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2019-12-27 15:08:12,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277916960] [2019-12-27 15:08:12,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,786 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 15:08:13,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277916960] [2019-12-27 15:08:13,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888313771] [2019-12-27 15:08:13,788 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 15:08:13,880 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:13,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:13,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 15:08:13,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:13,908 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 15:08:13,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:13,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 15:08:13,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [922186384] [2019-12-27 15:08:13,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:13,925 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:13,957 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 46 transitions. [2019-12-27 15:08:13,958 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:13,958 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:13,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 15:08:13,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 15:08:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 15:08:13,961 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 40 states. [2019-12-27 15:08:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:14,034 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2019-12-27 15:08:14,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 15:08:14,035 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 46 [2019-12-27 15:08:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:14,035 INFO L225 Difference]: With dead ends: 83 [2019-12-27 15:08:14,035 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:08:14,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 15:08:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:08:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-27 15:08:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:08:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2019-12-27 15:08:14,039 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2019-12-27 15:08:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:14,039 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2019-12-27 15:08:14,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 15:08:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2019-12-27 15:08:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 15:08:14,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:14,040 INFO L411 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:08:14,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:14,244 INFO L410 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:08:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2019-12-27 15:08:14,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:14,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134445594] [2019-12-27 15:08:14,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:14,910 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 15:08:14,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134445594] [2019-12-27 15:08:14,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896474536] [2019-12-27 15:08:14,911 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 15:08:18,087 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 15:08:18,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:18,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 15:08:18,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:18,116 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 15:08:18,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:18,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 15:08:18,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1668644571] [2019-12-27 15:08:18,117 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:18,125 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:18,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 47 transitions. [2019-12-27 15:08:18,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:18,151 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:18,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 15:08:18,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:18,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 15:08:18,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 15:08:18,152 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 41 states. [2019-12-27 15:08:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:18,213 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2019-12-27 15:08:18,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 15:08:18,220 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 47 [2019-12-27 15:08:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:18,221 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:08:18,221 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:08:18,222 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 15:08:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:08:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 15:08:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:08:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2019-12-27 15:08:18,224 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2019-12-27 15:08:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:18,224 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2019-12-27 15:08:18,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 15:08:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2019-12-27 15:08:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 15:08:18,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:18,225 INFO L411 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:08:18,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:18,433 INFO L410 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:08:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2019-12-27 15:08:18,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:18,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798262536] [2019-12-27 15:08:18,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:19,139 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 15:08:19,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798262536] [2019-12-27 15:08:19,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297184842] [2019-12-27 15:08:19,140 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 15:09:24,850 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-27 15:09:24,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:24,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 15:09:24,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:24,907 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 15:09:24,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:24,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 15:09:24,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [744852562] [2019-12-27 15:09:24,907 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:24,916 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:24,945 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 48 transitions. [2019-12-27 15:09:24,945 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:24,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:24,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 15:09:24,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 15:09:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 15:09:24,947 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 42 states. [2019-12-27 15:09:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:25,012 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2019-12-27 15:09:25,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 15:09:25,013 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 48 [2019-12-27 15:09:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:25,014 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:09:25,014 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 15:09:25,015 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 15:09:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 15:09:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-12-27 15:09:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:09:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2019-12-27 15:09:25,017 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2019-12-27 15:09:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:25,018 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2019-12-27 15:09:25,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 15:09:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2019-12-27 15:09:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-27 15:09:25,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:25,019 INFO L411 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:25,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:25,229 INFO L410 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2019-12-27 15:09:25,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:25,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167285911] [2019-12-27 15:09:25,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:26,298 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 15:09:26,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167285911] [2019-12-27 15:09:26,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220839910] [2019-12-27 15:09:26,298 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 15:09:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:26,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 15:09:26,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:26,406 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 15:09:26,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:26,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-27 15:09:26,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [827456705] [2019-12-27 15:09:26,407 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:26,416 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:26,445 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 49 transitions. [2019-12-27 15:09:26,445 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:26,446 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:26,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 15:09:26,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 15:09:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 15:09:26,447 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 43 states. [2019-12-27 15:09:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:26,511 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-12-27 15:09:26,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 15:09:26,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-12-27 15:09:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:26,512 INFO L225 Difference]: With dead ends: 86 [2019-12-27 15:09:26,512 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:09:26,513 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 15:09:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:09:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 15:09:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:09:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2019-12-27 15:09:26,515 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2019-12-27 15:09:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:26,516 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2019-12-27 15:09:26,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 15:09:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2019-12-27 15:09:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-27 15:09:26,516 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:26,517 INFO L411 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:26,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:26,720 INFO L410 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2019-12-27 15:09:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:26,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153154965] [2019-12-27 15:09:26,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:27,654 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 15:09:27,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153154965] [2019-12-27 15:09:27,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451447871] [2019-12-27 15:09:27,654 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 15:09:27,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:27,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:27,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 15:09:27,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:27,743 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 15:09:27,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:27,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-27 15:09:27,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1964556052] [2019-12-27 15:09:27,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:27,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:27,838 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 50 transitions. [2019-12-27 15:09:27,839 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:27,839 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:27,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-27 15:09:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-27 15:09:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 15:09:27,843 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 44 states. [2019-12-27 15:09:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:27,909 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2019-12-27 15:09:27,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 15:09:27,910 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 50 [2019-12-27 15:09:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:27,911 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:09:27,911 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 15:09:27,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 15:09:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 15:09:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-12-27 15:09:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 15:09:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2019-12-27 15:09:27,917 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2019-12-27 15:09:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:27,917 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2019-12-27 15:09:27,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-27 15:09:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2019-12-27 15:09:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-27 15:09:27,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:27,918 INFO L411 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:28,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:28,122 INFO L410 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2019-12-27 15:09:28,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:28,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420594928] [2019-12-27 15:09:28,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:28,946 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 15:09:28,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420594928] [2019-12-27 15:09:28,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699282752] [2019-12-27 15:09:28,946 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 15:09:42,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-27 15:09:42,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:42,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 15:09:42,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:42,537 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 15:09:42,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:42,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-27 15:09:42,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141745386] [2019-12-27 15:09:42,538 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:42,544 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:42,570 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 51 transitions. [2019-12-27 15:09:42,570 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:42,570 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:42,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-27 15:09:42,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-27 15:09:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 15:09:42,572 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 45 states. [2019-12-27 15:09:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:42,641 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2019-12-27 15:09:42,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 15:09:42,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 51 [2019-12-27 15:09:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:42,642 INFO L225 Difference]: With dead ends: 88 [2019-12-27 15:09:42,642 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 15:09:42,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 15:09:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 15:09:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 15:09:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:09:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2019-12-27 15:09:42,645 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2019-12-27 15:09:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:42,645 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2019-12-27 15:09:42,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-27 15:09:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2019-12-27 15:09:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 15:09:42,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:42,646 INFO L411 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:42,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:42,848 INFO L410 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2019-12-27 15:09:42,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:42,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560181188] [2019-12-27 15:09:42,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:43,723 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 15:09:43,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560181188] [2019-12-27 15:09:43,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546586548] [2019-12-27 15:09:43,724 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 15:09:43,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:43,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:43,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-27 15:09:43,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:43,819 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 15:09:43,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:43,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-12-27 15:09:43,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317417290] [2019-12-27 15:09:43,819 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:43,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:43,868 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 52 transitions. [2019-12-27 15:09:43,868 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:43,868 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:43,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-27 15:09:43,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:43,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-27 15:09:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 15:09:43,870 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 46 states. [2019-12-27 15:09:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:43,943 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2019-12-27 15:09:43,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 15:09:43,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 52 [2019-12-27 15:09:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:43,945 INFO L225 Difference]: With dead ends: 89 [2019-12-27 15:09:43,945 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 15:09:43,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 15:09:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 15:09:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-12-27 15:09:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 15:09:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2019-12-27 15:09:43,948 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2019-12-27 15:09:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:43,948 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-12-27 15:09:43,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-27 15:09:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2019-12-27 15:09:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-27 15:09:43,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:43,949 INFO L411 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:44,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,153 INFO L410 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2019-12-27 15:09:44,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:44,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563637116] [2019-12-27 15:09:44,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:45,377 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 15:09:45,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563637116] [2019-12-27 15:09:45,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945094321] [2019-12-27 15:09:45,378 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 15:09:52,266 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-12-27 15:09:52,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:52,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-27 15:09:52,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:52,289 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 15:09:52,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:52,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-12-27 15:09:52,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [190604592] [2019-12-27 15:09:52,290 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:52,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:52,333 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 54 states and 53 transitions. [2019-12-27 15:09:52,333 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:52,333 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:52,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-27 15:09:52,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-27 15:09:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 15:09:52,334 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 47 states. [2019-12-27 15:09:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:52,406 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2019-12-27 15:09:52,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 15:09:52,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 53 [2019-12-27 15:09:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:52,407 INFO L225 Difference]: With dead ends: 90 [2019-12-27 15:09:52,408 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 15:09:52,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 15:09:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 15:09:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 15:09:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 15:09:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2019-12-27 15:09:52,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2019-12-27 15:09:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:52,412 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2019-12-27 15:09:52,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-27 15:09:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2019-12-27 15:09:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-27 15:09:52,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:52,413 INFO L411 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:09:52,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,624 INFO L410 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:09:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2019-12-27 15:09:52,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:52,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247743902] [2019-12-27 15:09:52,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:53,520 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 15:09:53,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247743902] [2019-12-27 15:09:53,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135995179] [2019-12-27 15:09:53,520 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 15:10:05,469 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-27 15:10:05,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:05,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:05,498 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 15:10:05,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:05,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-12-27 15:10:05,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462657294] [2019-12-27 15:10:05,499 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:05,511 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:05,554 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 55 states and 54 transitions. [2019-12-27 15:10:05,554 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:05,555 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:05,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-27 15:10:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-27 15:10:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 15:10:05,556 INFO L87 Difference]: Start difference. First operand 90 states and 136 transitions. Second operand 48 states. [2019-12-27 15:10:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:05,635 INFO L93 Difference]: Finished difference Result 91 states and 137 transitions. [2019-12-27 15:10:05,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 15:10:05,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 54 [2019-12-27 15:10:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:05,636 INFO L225 Difference]: With dead ends: 91 [2019-12-27 15:10:05,636 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:10:05,637 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 15:10:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:10:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-12-27 15:10:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 15:10:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 137 transitions. [2019-12-27 15:10:05,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 137 transitions. Word has length 54 [2019-12-27 15:10:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:05,639 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 137 transitions. [2019-12-27 15:10:05,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-27 15:10:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 137 transitions. [2019-12-27 15:10:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-27 15:10:05,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,640 INFO L411 BasicCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,841 INFO L410 AbstractCegarLoop]: === Iteration 49 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -13736305, now seen corresponding path program 43 times [2019-12-27 15:10:05,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194755796] [2019-12-27 15:10:05,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,793 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 15:10:06,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194755796] [2019-12-27 15:10:06,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791660758] [2019-12-27 15:10:06,794 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 15:10:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:06,904 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 15:10:06,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:06,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-12-27 15:10:06,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1068185333] [2019-12-27 15:10:06,905 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:06,916 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:06,951 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 56 states and 55 transitions. [2019-12-27 15:10:06,951 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:06,951 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:06,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-12-27 15:10:06,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:06,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-12-27 15:10:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 15:10:06,952 INFO L87 Difference]: Start difference. First operand 91 states and 137 transitions. Second operand 49 states. [2019-12-27 15:10:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:07,021 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2019-12-27 15:10:07,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 15:10:07,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 55 [2019-12-27 15:10:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:07,023 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:10:07,023 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 15:10:07,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 15:10:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 15:10:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-27 15:10:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 15:10:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 138 transitions. [2019-12-27 15:10:07,027 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 138 transitions. Word has length 55 [2019-12-27 15:10:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:07,027 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 138 transitions. [2019-12-27 15:10:07,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-12-27 15:10:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 138 transitions. [2019-12-27 15:10:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-27 15:10:07,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:07,028 INFO L411 BasicCegarLoop]: trace histogram [47, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:07,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:07,229 INFO L410 AbstractCegarLoop]: === Iteration 50 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1854513960, now seen corresponding path program 44 times [2019-12-27 15:10:07,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:07,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273892450] [2019-12-27 15:10:07,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,308 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 15:10:08,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273892450] [2019-12-27 15:10:08,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139597909] [2019-12-27 15:10:08,308 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 15:10:08,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:08,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:08,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-27 15:10:08,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:08,417 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 15:10:08,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:08,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-12-27 15:10:08,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1005645198] [2019-12-27 15:10:08,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:08,431 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:08,473 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 57 states and 56 transitions. [2019-12-27 15:10:08,473 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:08,473 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:08,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-27 15:10:08,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-27 15:10:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 15:10:08,474 INFO L87 Difference]: Start difference. First operand 92 states and 138 transitions. Second operand 50 states. [2019-12-27 15:10:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:08,549 INFO L93 Difference]: Finished difference Result 93 states and 139 transitions. [2019-12-27 15:10:08,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 15:10:08,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 56 [2019-12-27 15:10:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:08,550 INFO L225 Difference]: With dead ends: 93 [2019-12-27 15:10:08,551 INFO L226 Difference]: Without dead ends: 93 [2019-12-27 15:10:08,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 15:10:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-27 15:10:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-12-27 15:10:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:10:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 139 transitions. [2019-12-27 15:10:08,553 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 139 transitions. Word has length 56 [2019-12-27 15:10:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:08,553 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 139 transitions. [2019-12-27 15:10:08,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-27 15:10:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 139 transitions. [2019-12-27 15:10:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-27 15:10:08,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:08,554 INFO L411 BasicCegarLoop]: trace histogram [48, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:08,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,755 INFO L410 AbstractCegarLoop]: === Iteration 51 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1210920879, now seen corresponding path program 45 times [2019-12-27 15:10:08,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:08,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830256041] [2019-12-27 15:10:08,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:10,298 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 15:10:10,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830256041] [2019-12-27 15:10:10,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196559346] [2019-12-27 15:10:10,299 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 [2019-12-27 15:10:13,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-12-27 15:10:13,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:13,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-27 15:10:13,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:13,490 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 15:10:13,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:13,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-12-27 15:10:13,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502555548] [2019-12-27 15:10:13,491 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:13,500 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:13,534 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 58 states and 57 transitions. [2019-12-27 15:10:13,535 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:13,535 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:13,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-27 15:10:13,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-27 15:10:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 15:10:13,536 INFO L87 Difference]: Start difference. First operand 93 states and 139 transitions. Second operand 51 states. [2019-12-27 15:10:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:13,608 INFO L93 Difference]: Finished difference Result 94 states and 140 transitions. [2019-12-27 15:10:13,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-27 15:10:13,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 57 [2019-12-27 15:10:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:13,610 INFO L225 Difference]: With dead ends: 94 [2019-12-27 15:10:13,610 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:10:13,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 15:10:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:10:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-12-27 15:10:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 15:10:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2019-12-27 15:10:13,614 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 57 [2019-12-27 15:10:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:13,614 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2019-12-27 15:10:13,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-27 15:10:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2019-12-27 15:10:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-12-27 15:10:13,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:13,615 INFO L411 BasicCegarLoop]: trace histogram [49, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:13,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,816 INFO L410 AbstractCegarLoop]: === Iteration 52 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1750120376, now seen corresponding path program 46 times [2019-12-27 15:10:13,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:13,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487807905] [2019-12-27 15:10:13,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 15:10:14,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487807905] [2019-12-27 15:10:14,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543907170] [2019-12-27 15:10:14,871 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:14,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:14,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:14,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-27 15:10:14,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 15:10:14,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:14,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2019-12-27 15:10:14,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525205002] [2019-12-27 15:10:14,979 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:14,991 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:15,028 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 59 states and 58 transitions. [2019-12-27 15:10:15,028 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:15,028 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:15,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-27 15:10:15,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-27 15:10:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 15:10:15,029 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand 52 states. [2019-12-27 15:10:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:15,149 INFO L93 Difference]: Finished difference Result 95 states and 141 transitions. [2019-12-27 15:10:15,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-12-27 15:10:15,150 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 58 [2019-12-27 15:10:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:15,151 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:10:15,151 INFO L226 Difference]: Without dead ends: 95 [2019-12-27 15:10:15,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 15:10:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-27 15:10:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-12-27 15:10:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 15:10:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 141 transitions. [2019-12-27 15:10:15,153 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 141 transitions. Word has length 58 [2019-12-27 15:10:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:15,154 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 141 transitions. [2019-12-27 15:10:15,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-27 15:10:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 141 transitions. [2019-12-27 15:10:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-12-27 15:10:15,154 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:15,154 INFO L411 BasicCegarLoop]: trace histogram [50, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:15,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:15,355 INFO L410 AbstractCegarLoop]: === Iteration 53 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1285435599, now seen corresponding path program 47 times [2019-12-27 15:10:15,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:15,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196775923] [2019-12-27 15:10:15,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 15:10:16,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196775923] [2019-12-27 15:10:16,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675158715] [2019-12-27 15:10:16,406 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:22,143 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-12-27 15:10:22,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:22,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-27 15:10:22,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 15:10:22,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:22,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2019-12-27 15:10:22,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1025585996] [2019-12-27 15:10:22,171 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:22,185 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:22,235 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 60 states and 59 transitions. [2019-12-27 15:10:22,236 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:22,236 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:22,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-12-27 15:10:22,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-12-27 15:10:22,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 15:10:22,237 INFO L87 Difference]: Start difference. First operand 95 states and 141 transitions. Second operand 53 states. [2019-12-27 15:10:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:22,308 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2019-12-27 15:10:22,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-12-27 15:10:22,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 59 [2019-12-27 15:10:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:22,309 INFO L225 Difference]: With dead ends: 96 [2019-12-27 15:10:22,310 INFO L226 Difference]: Without dead ends: 96 [2019-12-27 15:10:22,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 15:10:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-27 15:10:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-12-27 15:10:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:10:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 142 transitions. [2019-12-27 15:10:22,313 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 142 transitions. Word has length 59 [2019-12-27 15:10:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:22,313 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 142 transitions. [2019-12-27 15:10:22,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-12-27 15:10:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 142 transitions. [2019-12-27 15:10:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-12-27 15:10:22,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:22,314 INFO L411 BasicCegarLoop]: trace histogram [51, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 15:10:22,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:22,519 INFO L410 AbstractCegarLoop]: === Iteration 54 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 15:10:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash -234890600, now seen corresponding path program 48 times [2019-12-27 15:10:22,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:22,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140700160] [2019-12-27 15:10:22,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 15:10:23,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140700160] [2019-12-27 15:10:23,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374559505] [2019-12-27 15:10:23,644 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown