/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.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 00:41:52,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 00:41:52,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 00:41:52,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 00:41:52,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 00:41:52,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 00:41:52,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 00:41:52,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 00:41:52,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 00:41:52,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 00:41:52,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 00:41:52,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 00:41:52,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 00:41:52,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 00:41:52,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 00:41:52,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 00:41:52,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 00:41:52,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 00:41:52,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 00:41:52,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 00:41:52,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 00:41:52,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 00:41:52,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 00:41:52,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 00:41:52,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 00:41:52,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 00:41:52,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 00:41:52,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 00:41:52,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 00:41:52,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 00:41:52,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 00:41:52,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 00:41:52,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 00:41:52,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 00:41:52,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 00:41:52,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 00:41:52,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 00:41:52,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 00:41:52,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 00:41:52,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 00:41:52,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 00:41:52,419 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.epf [2019-12-27 00:41:52,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 00:41:52,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 00:41:52,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 00:41:52,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 00:41:52,435 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 00:41:52,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 00:41:52,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 00:41:52,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 00:41:52,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 00:41:52,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 00:41:52,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 00:41:52,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 00:41:52,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 00:41:52,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 00:41:52,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 00:41:52,438 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 00:41:52,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 00:41:52,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 00:41:52,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 00:41:52,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 00:41:52,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 00:41:52,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 00:41:52,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 00:41:52,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 00:41:52,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 00:41:52,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 00:41:52,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 00:41:52,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 00:41:52,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 00:41:52,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 00:41:52,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 00:41:52,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 00:41:52,757 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 00:41:52,757 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 00:41:52,758 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2019-12-27 00:41:52,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66daa4189/aa183fd29fd34f98a13159002a05d9ed/FLAGf1456df8d [2019-12-27 00:41:53,424 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 00:41:53,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2019-12-27 00:41:53,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66daa4189/aa183fd29fd34f98a13159002a05d9ed/FLAGf1456df8d [2019-12-27 00:41:53,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66daa4189/aa183fd29fd34f98a13159002a05d9ed [2019-12-27 00:41:53,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 00:41:53,672 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 00:41:53,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 00:41:53,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 00:41:53,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 00:41:53,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 12:41:53" (1/1) ... [2019-12-27 00:41:53,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b831f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:53, skipping insertion in model container [2019-12-27 00:41:53,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 12:41:53" (1/1) ... [2019-12-27 00:41:53,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 00:41:53,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 00:41:54,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 00:41:54,440 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 00:41:54,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 00:41:54,653 INFO L208 MainTranslator]: Completed translation [2019-12-27 00:41:54,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54 WrapperNode [2019-12-27 00:41:54,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 00:41:54,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 00:41:54,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 00:41:54,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 00:41:54,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 00:41:54,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 00:41:54,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 00:41:54,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 00:41:54,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (1/1) ... [2019-12-27 00:41:54,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 00:41:54,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 00:41:54,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 00:41:54,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 00:41:54,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (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 00:41:54,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 00:41:54,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 00:41:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-27 00:41:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2019-12-27 00:41:54,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2019-12-27 00:41:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 00:41:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-27 00:41:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 00:41:54,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 00:41:54,853 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 00:41:55,368 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 00:41:55,369 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-12-27 00:41:55,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 12:41:55 BoogieIcfgContainer [2019-12-27 00:41:55,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 00:41:55,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 00:41:55,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 00:41:55,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 00:41:55,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 12:41:53" (1/3) ... [2019-12-27 00:41:55,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b57ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 12:41:55, skipping insertion in model container [2019-12-27 00:41:55,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:54" (2/3) ... [2019-12-27 00:41:55,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b57ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 12:41:55, skipping insertion in model container [2019-12-27 00:41:55,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 12:41:55" (3/3) ... [2019-12-27 00:41:55,381 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2019-12-27 00:41:55,393 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 00:41:55,394 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 00:41:55,402 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 00:41:55,403 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 00:41:55,433 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,434 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,434 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,434 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,434 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,435 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,436 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,436 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,436 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,437 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,437 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,437 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,437 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,438 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,438 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,438 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,438 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,439 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,439 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,440 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,440 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,440 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,440 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,440 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,441 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,441 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,441 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,442 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,442 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,442 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,442 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,442 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,444 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,444 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,445 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,445 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,445 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,447 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,448 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,448 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,448 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,449 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,449 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,449 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,450 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,450 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,450 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,450 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,451 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,451 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,451 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,451 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,452 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,452 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,452 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,452 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,453 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,453 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,454 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,454 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,454 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,454 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,454 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,455 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,455 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,456 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,456 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,456 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,456 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,457 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,457 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,457 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,458 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,458 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,458 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,459 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,459 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,460 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,461 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,467 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,472 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,473 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,473 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,480 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,480 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,480 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,481 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,481 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,481 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,481 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,482 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,482 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,482 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,482 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,483 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,483 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,484 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,484 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,484 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,485 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,488 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,489 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,489 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,490 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,497 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:55,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 00:41:55,547 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 00:41:55,548 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 00:41:55,548 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 00:41:55,548 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 00:41:55,548 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 00:41:55,548 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 00:41:55,548 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 00:41:55,548 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 00:41:55,563 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions [2019-12-27 00:41:55,565 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 00:41:55,625 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 00:41:55,626 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 00:41:55,634 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 00:41:55,642 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions [2019-12-27 00:41:55,676 INFO L132 PetriNetUnfolder]: 18/126 cut-off events. [2019-12-27 00:41:55,676 INFO L133 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2019-12-27 00:41:55,679 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 00:41:55,685 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2019-12-27 00:41:55,687 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 00:41:57,947 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-12-27 00:41:58,133 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2019-12-27 00:41:58,134 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2019-12-27 00:41:58,137 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 25 transitions [2019-12-27 00:41:58,148 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2019-12-27 00:41:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-12-27 00:41:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 00:41:58,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:58,157 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:58,158 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:41:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2019-12-27 00:41:58,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:58,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744422033] [2019-12-27 00:41:58,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,360 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 00:41:58,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744422033] [2019-12-27 00:41:58,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:58,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 00:41:58,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715818229] [2019-12-27 00:41:58,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 00:41:58,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 00:41:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 00:41:58,390 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2019-12-27 00:41:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:58,482 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2019-12-27 00:41:58,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 00:41:58,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-27 00:41:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:58,499 INFO L225 Difference]: With dead ends: 61 [2019-12-27 00:41:58,499 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 00:41:58,501 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 00:41:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 00:41:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 00:41:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 00:41:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 00:41:58,538 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2019-12-27 00:41:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:58,539 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 00:41:58,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 00:41:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 00:41:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 00:41:58,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:58,540 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:58,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:41:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2019-12-27 00:41:58,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:58,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881215226] [2019-12-27 00:41:58,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,650 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 00:41:58,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881215226] [2019-12-27 00:41:58,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349671016] [2019-12-27 00:41:58,651 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 00:41:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 00:41:58,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:58,733 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 00:41:58,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:58,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-27 00:41:58,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258976517] [2019-12-27 00:41:58,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 00:41:58,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 00:41:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 00:41:58,737 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 5 states. [2019-12-27 00:41:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:58,776 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2019-12-27 00:41:58,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 00:41:58,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 00:41:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:58,778 INFO L225 Difference]: With dead ends: 42 [2019-12-27 00:41:58,778 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 00:41:58,779 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 00:41:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 00:41:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 00:41:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 00:41:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2019-12-27 00:41:58,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2019-12-27 00:41:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:58,786 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2019-12-27 00:41:58,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 00:41:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2019-12-27 00:41:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 00:41:58,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:58,787 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:58,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:58,991 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:41:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2019-12-27 00:41:58,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:58,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443501583] [2019-12-27 00:41:58,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:59,070 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 00:41:59,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443501583] [2019-12-27 00:41:59,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484476531] [2019-12-27 00:41:59,071 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 00:41:59,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-27 00:41:59,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:59,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 00:41:59,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:59,229 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 00:41:59,229 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 00:41:59,246 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 00:41:59,247 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-27 00:41:59,247 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-27 00:41:59,282 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 00:41:59,283 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 00:41:59,283 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 00:41:59,299 INFO L614 ElimStorePlain]: treesize reduction 16, result has 52.9 percent of original size [2019-12-27 00:41:59,300 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 00:41:59,301 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-12-27 00:41:59,387 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 00:41:59,388 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 00:41:59,392 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 00:41:59,392 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 00:41:59,392 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-27 00:41:59,407 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 00:41:59,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 00:41:59,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2019-12-27 00:41:59,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152273366] [2019-12-27 00:41:59,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 00:41:59,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 00:41:59,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-12-27 00:41:59,410 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2019-12-27 00:41:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:59,665 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 00:41:59,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:41:59,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-27 00:41:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:59,668 INFO L225 Difference]: With dead ends: 65 [2019-12-27 00:41:59,669 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 00:41:59,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:41:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 00:41:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2019-12-27 00:41:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 00:41:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 00:41:59,678 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2019-12-27 00:41:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:59,678 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 00:41:59,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 00:41:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 00:41:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:59,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:59,679 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:59,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:59,891 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:41:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2019-12-27 00:41:59,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:59,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239794490] [2019-12-27 00:41:59,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:59,952 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 00:41:59,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239794490] [2019-12-27 00:41:59,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750114358] [2019-12-27 00:41:59,953 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 00:42:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:00,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 00:42:00,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:00,032 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 00:42:00,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:00,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 00:42:00,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159129691] [2019-12-27 00:42:00,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 00:42:00,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 00:42:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-27 00:42:00,034 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 6 states. [2019-12-27 00:42:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:00,057 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2019-12-27 00:42:00,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 00:42:00,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-27 00:42:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:00,058 INFO L225 Difference]: With dead ends: 53 [2019-12-27 00:42:00,059 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 00:42:00,059 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 00:42:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 00:42:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 00:42:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 00:42:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2019-12-27 00:42:00,065 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2019-12-27 00:42:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:00,066 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2019-12-27 00:42:00,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 00:42:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2019-12-27 00:42:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:00,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:00,067 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:00,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:00,271 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2019-12-27 00:42:00,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:00,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39641441] [2019-12-27 00:42:00,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:00,374 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 00:42:00,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39641441] [2019-12-27 00:42:00,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701111635] [2019-12-27 00:42:00,375 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 00:42:00,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:00,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:00,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 00:42:00,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:00,450 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 00:42:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:00,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 00:42:00,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762076171] [2019-12-27 00:42:00,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 00:42:00,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 00:42:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-27 00:42:00,456 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2019-12-27 00:42:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:00,486 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2019-12-27 00:42:00,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 00:42:00,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-27 00:42:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:00,489 INFO L225 Difference]: With dead ends: 54 [2019-12-27 00:42:00,490 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 00:42:00,490 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 00:42:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 00:42:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 00:42:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 00:42:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2019-12-27 00:42:00,502 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2019-12-27 00:42:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:00,503 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2019-12-27 00:42:00,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 00:42:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2019-12-27 00:42:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:00,505 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:00,505 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:00,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:00,709 INFO L410 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2019-12-27 00:42:00,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:00,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651966929] [2019-12-27 00:42:00,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:00,794 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 00:42:00,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651966929] [2019-12-27 00:42:00,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029701948] [2019-12-27 00:42:00,795 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 00:42:00,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:42:00,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:00,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 00:42:00,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:00,909 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 00:42:00,909 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 00:42:00,915 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 00:42:00,916 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 00:42:00,916 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-12-27 00:42:00,935 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 00:42:00,935 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-27 00:42:00,939 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-27 00:42:00,939 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 00:42:00,940 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-27 00:42:00,960 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 00:42:00,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 00:42:00,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2019-12-27 00:42:00,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960409005] [2019-12-27 00:42:00,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 00:42:00,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 00:42:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:42:00,963 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2019-12-27 00:42:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:01,217 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 00:42:01,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:01,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 00:42:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:01,220 INFO L225 Difference]: With dead ends: 74 [2019-12-27 00:42:01,221 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 00:42:01,221 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 00:42:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 00:42:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2019-12-27 00:42:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 00:42:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2019-12-27 00:42:01,234 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2019-12-27 00:42:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:01,240 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2019-12-27 00:42:01,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 00:42:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2019-12-27 00:42:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:01,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:01,242 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:01,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,446 INFO L410 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2019-12-27 00:42:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:01,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231720153] [2019-12-27 00:42:01,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,531 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 00:42:01,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231720153] [2019-12-27 00:42:01,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433983533] [2019-12-27 00:42:01,532 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 00:42:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 00:42:01,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:01,594 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 00:42:01,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:01,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 00:42:01,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357955825] [2019-12-27 00:42:01,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 00:42:01,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 00:42:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-27 00:42:01,596 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 8 states. [2019-12-27 00:42:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:01,615 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-12-27 00:42:01,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:42:01,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 00:42:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:01,619 INFO L225 Difference]: With dead ends: 50 [2019-12-27 00:42:01,619 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 00:42:01,619 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 00:42:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 00:42:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 00:42:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 00:42:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2019-12-27 00:42:01,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2019-12-27 00:42:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:01,624 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2019-12-27 00:42:01,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 00:42:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2019-12-27 00:42:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:42:01,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:01,625 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:01,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,828 INFO L410 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2019-12-27 00:42:01,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:01,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145989596] [2019-12-27 00:42:01,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,888 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 00:42:01,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145989596] [2019-12-27 00:42:01,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353305213] [2019-12-27 00:42:01,889 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 00:42:01,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:01,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:01,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 00:42:01,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:01,954 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 00:42:01,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:01,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 00:42:01,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944690263] [2019-12-27 00:42:01,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 00:42:01,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 00:42:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-27 00:42:01,955 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 9 states. [2019-12-27 00:42:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:01,979 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2019-12-27 00:42:01,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:01,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 00:42:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:01,984 INFO L225 Difference]: With dead ends: 51 [2019-12-27 00:42:01,984 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 00:42:01,984 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 00:42:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 00:42:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-12-27 00:42:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 00:42:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2019-12-27 00:42:01,988 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2019-12-27 00:42:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:01,988 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2019-12-27 00:42:01,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 00:42:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2019-12-27 00:42:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 00:42:01,989 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:01,989 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:02,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:02,193 INFO L410 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2019-12-27 00:42:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:02,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861382777] [2019-12-27 00:42:02,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:02,279 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 00:42:02,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861382777] [2019-12-27 00:42:02,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308336386] [2019-12-27 00:42:02,280 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 00:42:02,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 00:42:02,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:02,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:42:02,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:02,354 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 00:42:02,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:02,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 00:42:02,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85817507] [2019-12-27 00:42:02,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:42:02,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:42:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:42:02,356 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 10 states. [2019-12-27 00:42:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:02,384 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2019-12-27 00:42:02,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:02,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 00:42:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:02,385 INFO L225 Difference]: With dead ends: 52 [2019-12-27 00:42:02,386 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 00:42:02,386 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 00:42:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 00:42:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 00:42:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 00:42:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2019-12-27 00:42:02,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2019-12-27 00:42:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:02,390 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2019-12-27 00:42:02,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:42:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2019-12-27 00:42:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 00:42:02,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:02,391 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:02,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:02,595 INFO L410 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2019-12-27 00:42:02,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:02,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119329404] [2019-12-27 00:42:02,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:02,674 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 00:42:02,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119329404] [2019-12-27 00:42:02,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386433341] [2019-12-27 00:42:02,674 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 00:42:02,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:02,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:02,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:02,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:02,744 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 00:42:02,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:02,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 00:42:02,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223891425] [2019-12-27 00:42:02,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 00:42:02,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 00:42:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-27 00:42:02,746 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 11 states. [2019-12-27 00:42:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:02,768 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2019-12-27 00:42:02,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:42:02,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 00:42:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:02,771 INFO L225 Difference]: With dead ends: 53 [2019-12-27 00:42:02,771 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 00:42:02,771 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 00:42:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 00:42:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-27 00:42:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 00:42:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2019-12-27 00:42:02,774 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2019-12-27 00:42:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:02,775 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2019-12-27 00:42:02,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 00:42:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2019-12-27 00:42:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 00:42:02,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:02,776 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:02,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:02,982 INFO L410 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2019-12-27 00:42:02,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:02,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48338416] [2019-12-27 00:42:02,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:03,057 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 00:42:03,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48338416] [2019-12-27 00:42:03,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541646396] [2019-12-27 00:42:03,058 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 00:42:03,114 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 00:42:03,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:03,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:03,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:03,125 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 00:42:03,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:03,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 00:42:03,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333383603] [2019-12-27 00:42:03,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:03,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:03,128 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 12 states. [2019-12-27 00:42:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:03,152 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2019-12-27 00:42:03,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:42:03,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 00:42:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:03,153 INFO L225 Difference]: With dead ends: 54 [2019-12-27 00:42:03,153 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 00:42:03,153 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 00:42:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 00:42:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 00:42:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 00:42:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2019-12-27 00:42:03,156 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2019-12-27 00:42:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:03,157 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2019-12-27 00:42:03,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2019-12-27 00:42:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 00:42:03,157 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:03,158 INFO L411 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:03,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,364 INFO L410 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2019-12-27 00:42:03,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:03,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214195876] [2019-12-27 00:42:03,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:03,517 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 00:42:03,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214195876] [2019-12-27 00:42:03,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143960221] [2019-12-27 00:42:03,517 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 00:42:03,595 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 00:42:03,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:03,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:03,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:03,606 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 00:42:03,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:03,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 00:42:03,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844605329] [2019-12-27 00:42:03,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 00:42:03,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 00:42:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:42:03,611 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 13 states. [2019-12-27 00:42:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:03,639 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2019-12-27 00:42:03,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:03,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 00:42:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:03,641 INFO L225 Difference]: With dead ends: 55 [2019-12-27 00:42:03,641 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 00:42:03,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:42:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 00:42:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-12-27 00:42:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 00:42:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2019-12-27 00:42:03,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2019-12-27 00:42:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:03,645 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2019-12-27 00:42:03,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 00:42:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2019-12-27 00:42:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 00:42:03,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:03,646 INFO L411 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:03,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,850 INFO L410 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2019-12-27 00:42:03,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:03,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529687672] [2019-12-27 00:42:03,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:03,965 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 00:42:03,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529687672] [2019-12-27 00:42:03,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337364999] [2019-12-27 00:42:03,966 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 00:42:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:04,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:42:04,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:04,050 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 00:42:04,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:04,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 00:42:04,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419236282] [2019-12-27 00:42:04,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:04,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:04,056 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 14 states. [2019-12-27 00:42:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:04,088 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2019-12-27 00:42:04,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:04,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 00:42:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:04,089 INFO L225 Difference]: With dead ends: 56 [2019-12-27 00:42:04,089 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 00:42:04,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 00:42:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 00:42:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 00:42:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2019-12-27 00:42:04,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2019-12-27 00:42:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:04,093 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2019-12-27 00:42:04,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2019-12-27 00:42:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 00:42:04,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:04,094 INFO L411 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:04,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:04,304 INFO L410 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2019-12-27 00:42:04,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:04,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841012103] [2019-12-27 00:42:04,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:04,441 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 00:42:04,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841012103] [2019-12-27 00:42:04,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082615469] [2019-12-27 00:42:04,442 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 00:42:04,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:04,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:04,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 00:42:04,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:04,544 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 00:42:04,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:04,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 00:42:04,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163961815] [2019-12-27 00:42:04,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 00:42:04,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 00:42:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 00:42:04,548 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 15 states. [2019-12-27 00:42:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:04,597 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2019-12-27 00:42:04,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:04,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 00:42:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:04,598 INFO L225 Difference]: With dead ends: 57 [2019-12-27 00:42:04,599 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 00:42:04,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-27 00:42:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 00:42:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-27 00:42:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 00:42:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2019-12-27 00:42:04,605 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2019-12-27 00:42:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:04,605 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2019-12-27 00:42:04,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 00:42:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2019-12-27 00:42:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 00:42:04,614 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:04,614 INFO L411 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:04,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:04,820 INFO L410 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2019-12-27 00:42:04,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:04,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111906569] [2019-12-27 00:42:04,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:05,050 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 00:42:05,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111906569] [2019-12-27 00:42:05,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009902414] [2019-12-27 00:42:05,051 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 00:42:05,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-27 00:42:05,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:05,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 00:42:05,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:05,203 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 00:42:05,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:05,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 00:42:05,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498435896] [2019-12-27 00:42:05,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:05,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:05,205 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 16 states. [2019-12-27 00:42:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:05,233 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2019-12-27 00:42:05,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:05,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-12-27 00:42:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:05,235 INFO L225 Difference]: With dead ends: 58 [2019-12-27 00:42:05,235 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 00:42:05,237 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 00:42:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 00:42:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 00:42:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 00:42:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2019-12-27 00:42:05,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2019-12-27 00:42:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:05,244 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2019-12-27 00:42:05,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2019-12-27 00:42:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 00:42:05,245 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:05,246 INFO L411 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:05,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:05,450 INFO L410 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2019-12-27 00:42:05,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:05,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713812637] [2019-12-27 00:42:05,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:05,615 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 00:42:05,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713812637] [2019-12-27 00:42:05,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005164024] [2019-12-27 00:42:05,616 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 00:42:05,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:05,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:05,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 00:42:05,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:05,727 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 00:42:05,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:05,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 00:42:05,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059685738] [2019-12-27 00:42:05,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 00:42:05,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:05,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 00:42:05,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:42:05,730 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 17 states. [2019-12-27 00:42:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:05,779 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2019-12-27 00:42:05,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:05,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-12-27 00:42:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:05,781 INFO L225 Difference]: With dead ends: 59 [2019-12-27 00:42:05,782 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 00:42:05,782 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 00:42:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 00:42:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-27 00:42:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 00:42:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2019-12-27 00:42:05,787 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2019-12-27 00:42:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:05,787 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2019-12-27 00:42:05,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 00:42:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2019-12-27 00:42:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 00:42:05,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:05,793 INFO L411 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:05,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:05,999 INFO L410 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2019-12-27 00:42:06,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:06,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454204539] [2019-12-27 00:42:06,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:06,214 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 00:42:06,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454204539] [2019-12-27 00:42:06,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206628412] [2019-12-27 00:42:06,215 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 00:42:06,360 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 00:42:06,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:06,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 00:42:06,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:06,388 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 00:42:06,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:06,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 00:42:06,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092019627] [2019-12-27 00:42:06,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:42:06,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:42:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:06,392 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 18 states. [2019-12-27 00:42:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:06,425 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2019-12-27 00:42:06,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:42:06,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2019-12-27 00:42:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:06,426 INFO L225 Difference]: With dead ends: 60 [2019-12-27 00:42:06,427 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 00:42:06,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 00:42:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 00:42:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 00:42:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2019-12-27 00:42:06,432 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2019-12-27 00:42:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:06,432 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2019-12-27 00:42:06,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:42:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2019-12-27 00:42:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 00:42:06,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:06,434 INFO L411 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:06,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:06,640 INFO L410 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2019-12-27 00:42:06,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:06,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020469509] [2019-12-27 00:42:06,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:06,849 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 00:42:06,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020469509] [2019-12-27 00:42:06,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312743377] [2019-12-27 00:42:06,850 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 00:42:07,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-27 00:42:07,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:07,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 00:42:07,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:07,108 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 00:42:07,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:07,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 00:42:07,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299379476] [2019-12-27 00:42:07,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 00:42:07,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 00:42:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:07,114 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 19 states. [2019-12-27 00:42:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:07,146 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2019-12-27 00:42:07,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:07,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2019-12-27 00:42:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:07,148 INFO L225 Difference]: With dead ends: 61 [2019-12-27 00:42:07,148 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 00:42:07,149 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 00:42:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 00:42:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-27 00:42:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-27 00:42:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2019-12-27 00:42:07,152 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2019-12-27 00:42:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:07,152 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2019-12-27 00:42:07,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 00:42:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2019-12-27 00:42:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 00:42:07,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:07,153 INFO L411 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:07,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:07,357 INFO L410 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2019-12-27 00:42:07,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:07,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576086646] [2019-12-27 00:42:07,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:07,578 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 00:42:07,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576086646] [2019-12-27 00:42:07,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283884439] [2019-12-27 00:42:07,578 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 00:42:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:07,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 00:42:07,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:07,656 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 00:42:07,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:07,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 00:42:07,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836526082] [2019-12-27 00:42:07,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 00:42:07,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 00:42:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-27 00:42:07,659 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 20 states. [2019-12-27 00:42:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:07,692 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2019-12-27 00:42:07,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:42:07,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-12-27 00:42:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:07,693 INFO L225 Difference]: With dead ends: 62 [2019-12-27 00:42:07,694 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 00:42:07,694 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 00:42:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 00:42:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 00:42:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 00:42:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2019-12-27 00:42:07,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2019-12-27 00:42:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:07,697 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2019-12-27 00:42:07,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 00:42:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2019-12-27 00:42:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 00:42:07,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:07,698 INFO L411 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:07,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:07,902 INFO L410 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2019-12-27 00:42:07,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:07,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409425523] [2019-12-27 00:42:07,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:08,095 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 00:42:08,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409425523] [2019-12-27 00:42:08,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969302138] [2019-12-27 00:42:08,095 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 00:42:08,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:08,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:08,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 00:42:08,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:08,161 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 00:42:08,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:08,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 00:42:08,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599189932] [2019-12-27 00:42:08,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 00:42:08,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 00:42:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 00:42:08,162 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 21 states. [2019-12-27 00:42:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:08,206 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2019-12-27 00:42:08,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:42:08,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2019-12-27 00:42:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:08,207 INFO L225 Difference]: With dead ends: 63 [2019-12-27 00:42:08,207 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 00:42:08,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-27 00:42:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 00:42:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-27 00:42:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 00:42:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2019-12-27 00:42:08,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2019-12-27 00:42:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:08,211 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2019-12-27 00:42:08,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 00:42:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2019-12-27 00:42:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 00:42:08,212 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:08,212 INFO L411 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:08,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:08,415 INFO L410 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:08,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2019-12-27 00:42:08,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:08,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298252678] [2019-12-27 00:42:08,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:08,632 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 00:42:08,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298252678] [2019-12-27 00:42:08,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825591025] [2019-12-27 00:42:08,633 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 00:42:09,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-27 00:42:09,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:09,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 00:42:09,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:09,532 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 00:42:09,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:09,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 00:42:09,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672446569] [2019-12-27 00:42:09,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 00:42:09,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 00:42:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:09,535 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 22 states. [2019-12-27 00:42:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:09,567 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2019-12-27 00:42:09,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:42:09,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-12-27 00:42:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:09,569 INFO L225 Difference]: With dead ends: 64 [2019-12-27 00:42:09,569 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 00:42:09,569 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 00:42:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 00:42:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 00:42:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 00:42:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2019-12-27 00:42:09,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2019-12-27 00:42:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:09,573 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2019-12-27 00:42:09,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 00:42:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2019-12-27 00:42:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 00:42:09,574 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:09,574 INFO L411 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:09,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:09,780 INFO L410 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2019-12-27 00:42:09,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:09,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350731032] [2019-12-27 00:42:09,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:10,050 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 00:42:10,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350731032] [2019-12-27 00:42:10,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838651248] [2019-12-27 00:42:10,051 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 00:42:10,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:10,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:10,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 00:42:10,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:10,129 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 00:42:10,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:10,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 00:42:10,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301080931] [2019-12-27 00:42:10,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 00:42:10,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:10,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 00:42:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:10,131 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 23 states. [2019-12-27 00:42:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:10,176 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2019-12-27 00:42:10,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:42:10,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2019-12-27 00:42:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:10,178 INFO L225 Difference]: With dead ends: 65 [2019-12-27 00:42:10,178 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 00:42:10,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 00:42:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-27 00:42:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-27 00:42:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2019-12-27 00:42:10,181 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2019-12-27 00:42:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:10,182 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2019-12-27 00:42:10,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 00:42:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2019-12-27 00:42:10,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 00:42:10,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:10,182 INFO L411 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:10,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:10,383 INFO L410 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2019-12-27 00:42:10,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:10,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437803887] [2019-12-27 00:42:10,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:10,670 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 00:42:10,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437803887] [2019-12-27 00:42:10,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660074813] [2019-12-27 00:42:10,671 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 00:42:10,965 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 00:42:10,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:10,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 00:42:10,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:11,009 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 00:42:11,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:11,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 00:42:11,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029136711] [2019-12-27 00:42:11,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 00:42:11,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 00:42:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:42:11,011 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 24 states. [2019-12-27 00:42:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:11,052 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2019-12-27 00:42:11,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 00:42:11,052 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-12-27 00:42:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:11,053 INFO L225 Difference]: With dead ends: 66 [2019-12-27 00:42:11,053 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 00:42:11,053 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 00:42:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 00:42:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 00:42:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 00:42:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2019-12-27 00:42:11,058 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2019-12-27 00:42:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:11,059 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2019-12-27 00:42:11,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 00:42:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2019-12-27 00:42:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 00:42:11,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:11,059 INFO L411 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:11,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:11,265 INFO L410 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2019-12-27 00:42:11,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:11,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496411387] [2019-12-27 00:42:11,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:11,522 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 00:42:11,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496411387] [2019-12-27 00:42:11,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28681762] [2019-12-27 00:42:11,523 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 00:42:11,809 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-12-27 00:42:11,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:11,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 00:42:11,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:11,823 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 00:42:11,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:11,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 00:42:11,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243038094] [2019-12-27 00:42:11,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 00:42:11,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 00:42:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:11,825 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 25 states. [2019-12-27 00:42:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:11,864 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2019-12-27 00:42:11,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 00:42:11,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2019-12-27 00:42:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:11,865 INFO L225 Difference]: With dead ends: 67 [2019-12-27 00:42:11,865 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 00:42:11,866 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 00:42:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 00:42:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-12-27 00:42:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 00:42:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2019-12-27 00:42:11,868 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2019-12-27 00:42:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:11,868 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2019-12-27 00:42:11,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 00:42:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2019-12-27 00:42:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 00:42:11,869 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:11,869 INFO L411 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:12,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:12,069 INFO L410 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2019-12-27 00:42:12,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:12,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795564693] [2019-12-27 00:42:12,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:12,491 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 00:42:12,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795564693] [2019-12-27 00:42:12,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345069815] [2019-12-27 00:42:12,491 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 00:42:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:12,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 00:42:12,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:12,567 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 00:42:12,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:12,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 00:42:12,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683585165] [2019-12-27 00:42:12,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 00:42:12,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 00:42:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:12,569 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 26 states. [2019-12-27 00:42:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:12,608 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2019-12-27 00:42:12,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 00:42:12,608 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2019-12-27 00:42:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:12,609 INFO L225 Difference]: With dead ends: 68 [2019-12-27 00:42:12,609 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 00:42:12,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 00:42:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 00:42:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 00:42:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2019-12-27 00:42:12,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2019-12-27 00:42:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:12,613 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2019-12-27 00:42:12,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 00:42:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2019-12-27 00:42:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 00:42:12,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:12,613 INFO L411 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:12,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:12,817 INFO L410 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2019-12-27 00:42:12,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:12,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542574095] [2019-12-27 00:42:12,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:13,124 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 00:42:13,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542574095] [2019-12-27 00:42:13,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300829891] [2019-12-27 00:42:13,125 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 00:42:13,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:13,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:13,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 00:42:13,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:13,212 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 00:42:13,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:13,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 00:42:13,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347982652] [2019-12-27 00:42:13,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 00:42:13,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:13,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 00:42:13,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:42:13,214 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 27 states. [2019-12-27 00:42:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:13,251 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2019-12-27 00:42:13,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 00:42:13,251 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2019-12-27 00:42:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:13,252 INFO L225 Difference]: With dead ends: 69 [2019-12-27 00:42:13,252 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 00:42:13,252 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 00:42:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 00:42:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-27 00:42:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-27 00:42:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2019-12-27 00:42:13,255 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2019-12-27 00:42:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:13,255 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2019-12-27 00:42:13,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 00:42:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2019-12-27 00:42:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 00:42:13,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:13,256 INFO L411 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:13,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:13,460 INFO L410 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2019-12-27 00:42:13,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:13,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115921217] [2019-12-27 00:42:13,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:13,818 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 00:42:13,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115921217] [2019-12-27 00:42:13,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737231591] [2019-12-27 00:42:13,819 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 00:42:14,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-12-27 00:42:14,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:14,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 00:42:14,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:14,300 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 00:42:14,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:14,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 00:42:14,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550140239] [2019-12-27 00:42:14,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 00:42:14,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 00:42:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:42:14,302 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 28 states. [2019-12-27 00:42:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:14,356 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2019-12-27 00:42:14,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 00:42:14,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-12-27 00:42:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:14,357 INFO L225 Difference]: With dead ends: 70 [2019-12-27 00:42:14,357 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 00:42:14,357 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 00:42:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 00:42:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 00:42:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 00:42:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2019-12-27 00:42:14,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2019-12-27 00:42:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:14,360 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2019-12-27 00:42:14,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 00:42:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2019-12-27 00:42:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 00:42:14,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:14,361 INFO L411 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:14,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:14,566 INFO L410 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2019-12-27 00:42:14,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:14,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959395946] [2019-12-27 00:42:14,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:15,012 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 00:42:15,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959395946] [2019-12-27 00:42:15,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376421739] [2019-12-27 00:42:15,012 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 00:42:15,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:15,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:15,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 00:42:15,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:15,090 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 00:42:15,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:15,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 00:42:15,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896212519] [2019-12-27 00:42:15,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 00:42:15,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 00:42:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:42:15,092 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 29 states. [2019-12-27 00:42:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:15,148 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2019-12-27 00:42:15,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 00:42:15,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2019-12-27 00:42:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:15,150 INFO L225 Difference]: With dead ends: 71 [2019-12-27 00:42:15,150 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 00:42:15,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:42:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 00:42:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-27 00:42:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 00:42:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2019-12-27 00:42:15,154 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2019-12-27 00:42:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:15,154 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2019-12-27 00:42:15,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 00:42:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2019-12-27 00:42:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 00:42:15,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:15,155 INFO L411 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:15,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:15,356 INFO L410 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2019-12-27 00:42:15,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:15,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438195134] [2019-12-27 00:42:15,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:15,811 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 00:42:15,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438195134] [2019-12-27 00:42:15,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363522604] [2019-12-27 00:42:15,811 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 00:42:16,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 00:42:16,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:16,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 00:42:16,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:16,083 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 00:42:16,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:16,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 00:42:16,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611301584] [2019-12-27 00:42:16,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 00:42:16,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 00:42:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:42:16,085 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 30 states. [2019-12-27 00:42:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:16,150 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2019-12-27 00:42:16,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 00:42:16,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2019-12-27 00:42:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:16,157 INFO L225 Difference]: With dead ends: 72 [2019-12-27 00:42:16,157 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 00:42:16,157 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 00:42:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 00:42:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 00:42:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 00:42:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2019-12-27 00:42:16,160 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2019-12-27 00:42:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:16,160 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2019-12-27 00:42:16,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 00:42:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2019-12-27 00:42:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 00:42:16,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:16,161 INFO L411 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:16,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:16,365 INFO L410 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2019-12-27 00:42:16,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:16,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516771106] [2019-12-27 00:42:16,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:16,814 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 00:42:16,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516771106] [2019-12-27 00:42:16,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888551058] [2019-12-27 00:42:16,814 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 00:42:19,484 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-12-27 00:42:19,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:19,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 00:42:19,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:19,505 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 00:42:19,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:19,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 00:42:19,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300339001] [2019-12-27 00:42:19,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 00:42:19,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 00:42:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 00:42:19,507 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 31 states. [2019-12-27 00:42:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:19,562 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2019-12-27 00:42:19,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 00:42:19,563 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2019-12-27 00:42:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:19,563 INFO L225 Difference]: With dead ends: 73 [2019-12-27 00:42:19,563 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 00:42:19,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-12-27 00:42:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 00:42:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-12-27 00:42:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-12-27 00:42:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2019-12-27 00:42:19,568 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2019-12-27 00:42:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:19,568 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2019-12-27 00:42:19,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 00:42:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2019-12-27 00:42:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 00:42:19,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:19,569 INFO L411 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:19,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:19,770 INFO L410 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:19,771 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2019-12-27 00:42:19,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:19,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940323591] [2019-12-27 00:42:19,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:20,187 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 00:42:20,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940323591] [2019-12-27 00:42:20,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409396072] [2019-12-27 00:42:20,187 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 00:42:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:20,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 00:42:20,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:20,262 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 00:42:20,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:20,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 00:42:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223724066] [2019-12-27 00:42:20,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 00:42:20,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 00:42:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:42:20,264 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 32 states. [2019-12-27 00:42:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:20,319 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2019-12-27 00:42:20,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 00:42:20,321 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2019-12-27 00:42:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:20,322 INFO L225 Difference]: With dead ends: 74 [2019-12-27 00:42:20,322 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 00:42:20,323 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 00:42:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 00:42:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 00:42:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 00:42:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2019-12-27 00:42:20,326 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2019-12-27 00:42:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:20,326 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2019-12-27 00:42:20,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 00:42:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2019-12-27 00:42:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 00:42:20,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:20,327 INFO L411 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:20,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:20,530 INFO L410 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2019-12-27 00:42:20,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:20,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132355750] [2019-12-27 00:42:20,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:20,956 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 00:42:20,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132355750] [2019-12-27 00:42:20,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657368152] [2019-12-27 00:42:20,957 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 00:42:21,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:21,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:21,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 00:42:21,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:21,036 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 00:42:21,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:21,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 00:42:21,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300339251] [2019-12-27 00:42:21,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 00:42:21,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 00:42:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 00:42:21,038 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 33 states. [2019-12-27 00:42:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:21,085 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2019-12-27 00:42:21,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 00:42:21,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2019-12-27 00:42:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:21,087 INFO L225 Difference]: With dead ends: 75 [2019-12-27 00:42:21,087 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 00:42:21,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 00:42:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 00:42:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-12-27 00:42:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 00:42:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2019-12-27 00:42:21,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2019-12-27 00:42:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:21,091 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2019-12-27 00:42:21,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 00:42:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2019-12-27 00:42:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 00:42:21,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:21,091 INFO L411 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:21,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:21,292 INFO L410 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2019-12-27 00:42:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:21,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147683174] [2019-12-27 00:42:21,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:21,767 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 00:42:21,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147683174] [2019-12-27 00:42:21,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597466332] [2019-12-27 00:42:21,768 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 00:42:25,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-27 00:42:25,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:25,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 00:42:25,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:25,381 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 00:42:25,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:25,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 00:42:25,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460339729] [2019-12-27 00:42:25,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 00:42:25,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 00:42:25,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 00:42:25,384 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 34 states. [2019-12-27 00:42:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:25,450 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-12-27 00:42:25,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 00:42:25,450 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2019-12-27 00:42:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:25,451 INFO L225 Difference]: With dead ends: 76 [2019-12-27 00:42:25,451 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 00:42:25,452 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 00:42:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 00:42:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 00:42:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 00:42:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2019-12-27 00:42:25,455 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2019-12-27 00:42:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:25,455 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2019-12-27 00:42:25,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 00:42:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2019-12-27 00:42:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 00:42:25,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:25,456 INFO L411 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:25,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:25,663 INFO L410 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2019-12-27 00:42:25,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:25,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274895965] [2019-12-27 00:42:25,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:26,432 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 00:42:26,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274895965] [2019-12-27 00:42:26,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331265318] [2019-12-27 00:42:26,433 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 00:42:26,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:26,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:26,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 00:42:26,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:26,557 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 00:42:26,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:26,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 00:42:26,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254955858] [2019-12-27 00:42:26,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 00:42:26,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 00:42:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 00:42:26,559 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 35 states. [2019-12-27 00:42:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:26,631 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2019-12-27 00:42:26,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 00:42:26,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2019-12-27 00:42:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:26,633 INFO L225 Difference]: With dead ends: 77 [2019-12-27 00:42:26,633 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 00:42:26,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 00:42:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 00:42:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-27 00:42:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 00:42:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2019-12-27 00:42:26,638 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2019-12-27 00:42:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:26,639 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2019-12-27 00:42:26,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 00:42:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2019-12-27 00:42:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 00:42:26,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:26,640 INFO L411 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:26,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:26,845 INFO L410 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2019-12-27 00:42:26,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:26,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355764428] [2019-12-27 00:42:26,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:27,554 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 00:42:27,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355764428] [2019-12-27 00:42:27,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930450459] [2019-12-27 00:42:27,555 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 00:42:28,277 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 00:42:28,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:28,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 00:42:28,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:28,295 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 00:42:28,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:28,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 00:42:28,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530441994] [2019-12-27 00:42:28,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 00:42:28,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 00:42:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 00:42:28,297 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 36 states. [2019-12-27 00:42:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:28,354 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2019-12-27 00:42:28,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 00:42:28,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2019-12-27 00:42:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:28,356 INFO L225 Difference]: With dead ends: 78 [2019-12-27 00:42:28,356 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 00:42:28,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 00:42:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 00:42:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 00:42:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 00:42:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2019-12-27 00:42:28,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2019-12-27 00:42:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:28,360 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2019-12-27 00:42:28,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 00:42:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2019-12-27 00:42:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 00:42:28,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:28,361 INFO L411 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:28,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:28,562 INFO L410 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2019-12-27 00:42:28,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:28,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830971424] [2019-12-27 00:42:28,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:29,130 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 00:42:29,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830971424] [2019-12-27 00:42:29,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042570710] [2019-12-27 00:42:29,131 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 00:42:36,576 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-12-27 00:42:36,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:36,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 00:42:36,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:36,600 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 00:42:36,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:36,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 00:42:36,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387181166] [2019-12-27 00:42:36,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 00:42:36,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 00:42:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 00:42:36,602 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 37 states. [2019-12-27 00:42:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:36,683 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2019-12-27 00:42:36,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 00:42:36,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2019-12-27 00:42:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:36,684 INFO L225 Difference]: With dead ends: 79 [2019-12-27 00:42:36,684 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 00:42:36,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 00:42:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 00:42:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-27 00:42:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-27 00:42:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2019-12-27 00:42:36,688 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2019-12-27 00:42:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:36,688 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2019-12-27 00:42:36,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 00:42:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2019-12-27 00:42:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 00:42:36,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:36,689 INFO L411 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:36,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:36,898 INFO L410 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2019-12-27 00:42:36,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:36,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254551092] [2019-12-27 00:42:36,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:37,431 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 00:42:37,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254551092] [2019-12-27 00:42:37,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918336690] [2019-12-27 00:42:37,432 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 00:42:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:37,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 00:42:37,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:37,511 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 00:42:37,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:37,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 00:42:37,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436715865] [2019-12-27 00:42:37,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 00:42:37,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 00:42:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 00:42:37,513 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 38 states. [2019-12-27 00:42:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:37,592 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2019-12-27 00:42:37,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 00:42:37,592 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-12-27 00:42:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:37,593 INFO L225 Difference]: With dead ends: 80 [2019-12-27 00:42:37,593 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 00:42:37,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 00:42:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 00:42:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 00:42:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 00:42:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2019-12-27 00:42:37,597 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2019-12-27 00:42:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:37,597 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2019-12-27 00:42:37,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 00:42:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2019-12-27 00:42:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 00:42:37,598 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:37,598 INFO L411 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:37,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:37,801 INFO L410 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2019-12-27 00:42:37,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:37,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018617584] [2019-12-27 00:42:37,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:38,378 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 00:42:38,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018617584] [2019-12-27 00:42:38,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356467926] [2019-12-27 00:42:38,379 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 00:42:38,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:38,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:38,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 00:42:38,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:38,458 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 00:42:38,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:38,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 00:42:38,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913563276] [2019-12-27 00:42:38,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 00:42:38,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 00:42:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 00:42:38,460 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 39 states. [2019-12-27 00:42:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:38,536 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-12-27 00:42:38,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 00:42:38,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2019-12-27 00:42:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:38,538 INFO L225 Difference]: With dead ends: 81 [2019-12-27 00:42:38,539 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 00:42:38,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 00:42:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 00:42:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-27 00:42:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 00:42:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2019-12-27 00:42:38,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2019-12-27 00:42:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:38,542 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2019-12-27 00:42:38,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 00:42:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2019-12-27 00:42:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 00:42:38,543 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:38,543 INFO L411 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:38,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:38,744 INFO L410 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2019-12-27 00:42:38,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:38,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311690556] [2019-12-27 00:42:38,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:39,325 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 00:42:39,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311690556] [2019-12-27 00:42:39,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981167230] [2019-12-27 00:42:39,326 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 00:42:48,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-12-27 00:42:48,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:48,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 00:42:48,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:48,070 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 00:42:48,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:48,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 00:42:48,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951926844] [2019-12-27 00:42:48,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 00:42:48,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 00:42:48,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 00:42:48,072 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 40 states. [2019-12-27 00:42:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:48,139 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2019-12-27 00:42:48,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 00:42:48,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2019-12-27 00:42:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:48,140 INFO L225 Difference]: With dead ends: 82 [2019-12-27 00:42:48,140 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 00:42:48,141 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 00:42:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 00:42:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 00:42:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 00:42:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2019-12-27 00:42:48,143 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2019-12-27 00:42:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:48,143 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2019-12-27 00:42:48,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 00:42:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2019-12-27 00:42:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 00:42:48,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:48,144 INFO L411 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:48,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:48,353 INFO L410 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2019-12-27 00:42:48,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:48,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001519138] [2019-12-27 00:42:48,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:49,248 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 00:42:49,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001519138] [2019-12-27 00:42:49,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285225410] [2019-12-27 00:42:49,248 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 00:42:49,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:49,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:49,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 00:42:49,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:49,331 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 00:42:49,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:49,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 00:42:49,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800167415] [2019-12-27 00:42:49,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 00:42:49,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 00:42:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 00:42:49,333 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 41 states. [2019-12-27 00:42:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:49,382 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2019-12-27 00:42:49,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 00:42:49,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2019-12-27 00:42:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:49,384 INFO L225 Difference]: With dead ends: 83 [2019-12-27 00:42:49,384 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 00:42:49,385 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 00:42:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 00:42:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-27 00:42:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 00:42:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2019-12-27 00:42:49,389 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2019-12-27 00:42:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:49,389 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2019-12-27 00:42:49,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 00:42:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2019-12-27 00:42:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 00:42:49,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:49,390 INFO L411 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:49,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:49,591 INFO L410 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2019-12-27 00:42:49,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:49,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119633715] [2019-12-27 00:42:49,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:50,431 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 00:42:50,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119633715] [2019-12-27 00:42:50,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921924990] [2019-12-27 00:42:50,431 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 00:42:53,675 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 00:42:53,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:53,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 00:42:53,682 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:53,715 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 00:42:53,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:53,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 00:42:53,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605802399] [2019-12-27 00:42:53,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 00:42:53,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 00:42:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 00:42:53,716 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 42 states. [2019-12-27 00:42:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:53,775 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2019-12-27 00:42:53,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 00:42:53,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2019-12-27 00:42:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:53,784 INFO L225 Difference]: With dead ends: 84 [2019-12-27 00:42:53,784 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 00:42:53,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 00:42:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 00:42:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 00:42:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 00:42:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2019-12-27 00:42:53,787 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2019-12-27 00:42:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:53,787 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2019-12-27 00:42:53,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 00:42:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2019-12-27 00:42:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 00:42:53,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:53,788 INFO L411 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:42:53,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:53,996 INFO L410 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:42:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2019-12-27 00:42:53,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:53,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161074743] [2019-12-27 00:42:53,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:54,701 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 00:42:54,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161074743] [2019-12-27 00:42:54,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167270587] [2019-12-27 00:42:54,701 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 00:43:51,936 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-27 00:43:51,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:51,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 00:43:51,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:51,977 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 00:43:51,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:51,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 00:43:51,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897412944] [2019-12-27 00:43:51,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 00:43:51,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 00:43:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 00:43:51,979 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 43 states. [2019-12-27 00:43:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:52,053 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2019-12-27 00:43:52,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 00:43:52,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 48 [2019-12-27 00:43:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:52,054 INFO L225 Difference]: With dead ends: 85 [2019-12-27 00:43:52,054 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 00:43:52,055 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 00:43:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 00:43:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-12-27 00:43:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 00:43:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2019-12-27 00:43:52,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2019-12-27 00:43:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:52,058 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2019-12-27 00:43:52,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 00:43:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2019-12-27 00:43:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-27 00:43:52,058 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:52,059 INFO L411 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:43:52,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:52,267 INFO L410 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:43:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2019-12-27 00:43:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:52,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31142233] [2019-12-27 00:43:52,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:52,980 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 00:43:52,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31142233] [2019-12-27 00:43:52,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724957629] [2019-12-27 00:43:52,980 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 00:43:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:53,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 00:43:53,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:53,069 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 00:43:53,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:53,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-27 00:43:53,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743083670] [2019-12-27 00:43:53,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-27 00:43:53,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-27 00:43:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 00:43:53,071 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 44 states. [2019-12-27 00:43:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:53,127 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-12-27 00:43:53,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 00:43:53,127 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2019-12-27 00:43:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:53,128 INFO L225 Difference]: With dead ends: 86 [2019-12-27 00:43:53,128 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 00:43:53,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 00:43:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 00:43:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 00:43:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 00:43:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2019-12-27 00:43:53,132 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2019-12-27 00:43:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:53,134 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2019-12-27 00:43:53,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-27 00:43:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2019-12-27 00:43:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-27 00:43:53,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:53,135 INFO L411 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:43:53,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:53,339 INFO L410 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:43:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2019-12-27 00:43:53,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:53,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745877488] [2019-12-27 00:43:53,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:54,080 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 00:43:54,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745877488] [2019-12-27 00:43:54,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872554934] [2019-12-27 00:43:54,081 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 00:43:54,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:54,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:54,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 00:43:54,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:54,167 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 00:43:54,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-27 00:43:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698169289] [2019-12-27 00:43:54,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-27 00:43:54,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-27 00:43:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 00:43:54,169 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 45 states. [2019-12-27 00:43:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:54,253 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2019-12-27 00:43:54,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 00:43:54,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2019-12-27 00:43:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:54,255 INFO L225 Difference]: With dead ends: 87 [2019-12-27 00:43:54,255 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 00:43:54,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 00:43:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 00:43:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-12-27 00:43:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 00:43:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2019-12-27 00:43:54,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2019-12-27 00:43:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:54,258 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2019-12-27 00:43:54,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-27 00:43:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2019-12-27 00:43:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-27 00:43:54,259 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:54,259 INFO L411 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:43:54,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:54,462 INFO L410 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:43:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2019-12-27 00:43:54,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:54,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101677180] [2019-12-27 00:43:54,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:55,245 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 00:43:55,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101677180] [2019-12-27 00:43:55,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210125320] [2019-12-27 00:43:55,246 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 00:44:07,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-27 00:44:07,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:07,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 00:44:07,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:07,893 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 00:44:07,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:07,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-27 00:44:07,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693601285] [2019-12-27 00:44:07,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-27 00:44:07,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:07,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-27 00:44:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 00:44:07,895 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 46 states. [2019-12-27 00:44:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:08,038 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2019-12-27 00:44:08,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 00:44:08,038 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2019-12-27 00:44:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:08,039 INFO L225 Difference]: With dead ends: 88 [2019-12-27 00:44:08,039 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 00:44:08,040 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 00:44:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 00:44:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 00:44:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 00:44:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2019-12-27 00:44:08,043 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2019-12-27 00:44:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:08,043 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2019-12-27 00:44:08,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-27 00:44:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2019-12-27 00:44:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-27 00:44:08,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:08,044 INFO L411 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:44:08,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:08,244 INFO L410 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:44:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2019-12-27 00:44:08,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:08,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779184378] [2019-12-27 00:44:08,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:09,215 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 00:44:09,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779184378] [2019-12-27 00:44:09,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792125145] [2019-12-27 00:44:09,215 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 00:44:09,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:44:09,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:09,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-27 00:44:09,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:09,326 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 00:44:09,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:09,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-12-27 00:44:09,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728882635] [2019-12-27 00:44:09,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-27 00:44:09,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-27 00:44:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 00:44:09,328 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 47 states. [2019-12-27 00:44:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:09,409 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2019-12-27 00:44:09,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 00:44:09,409 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 52 [2019-12-27 00:44:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:09,410 INFO L225 Difference]: With dead ends: 89 [2019-12-27 00:44:09,410 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 00:44:09,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 00:44:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 00:44:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-12-27 00:44:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 00:44:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2019-12-27 00:44:09,416 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2019-12-27 00:44:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:09,416 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-12-27 00:44:09,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-27 00:44:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2019-12-27 00:44:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-27 00:44:09,417 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:09,417 INFO L411 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:44:09,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:09,620 INFO L410 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:44:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2019-12-27 00:44:09,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:09,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055408683] [2019-12-27 00:44:09,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:10,906 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 00:44:10,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055408683] [2019-12-27 00:44:10,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792197015] [2019-12-27 00:44:10,907 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 00:44:17,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-12-27 00:44:17,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:17,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-27 00:44:17,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:17,787 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 00:44:17,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:17,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-12-27 00:44:17,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193940754] [2019-12-27 00:44:17,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-27 00:44:17,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-27 00:44:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 00:44:17,789 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 48 states. [2019-12-27 00:44:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:17,871 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2019-12-27 00:44:17,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 00:44:17,871 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2019-12-27 00:44:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:17,872 INFO L225 Difference]: With dead ends: 90 [2019-12-27 00:44:17,872 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 00:44:17,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 00:44:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 00:44:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 00:44:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 00:44:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2019-12-27 00:44:17,875 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2019-12-27 00:44:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:17,875 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2019-12-27 00:44:17,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-27 00:44:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2019-12-27 00:44:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-27 00:44:17,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:17,877 INFO L411 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2019-12-27 00:44:18,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:18,082 INFO L410 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2019-12-27 00:44:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2019-12-27 00:44:18,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:18,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469431911] [2019-12-27 00:44:18,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:18,936 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 00:44:18,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469431911] [2019-12-27 00:44:18,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365936999] [2019-12-27 00:44:18,936 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 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown