/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:46:39,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:46:39,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:46:39,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:46:39,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:46:39,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:46:39,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:46:39,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:46:39,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:46:39,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:46:39,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:46:39,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:46:39,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:46:39,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:46:39,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:46:39,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:46:39,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:46:39,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:46:39,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:46:39,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:46:39,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:46:39,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:46:39,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:46:39,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:46:39,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:46:39,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:46:39,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:46:39,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:46:39,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:46:39,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:46:39,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:46:39,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:46:39,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:46:39,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:46:39,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:46:39,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:46:39,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:46:39,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:46:39,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:46:39,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:46:39,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:46:39,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:46:39,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:46:39,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:46:39,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:46:39,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:46:39,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:46:39,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:46:39,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:46:39,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:46:39,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:46:39,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:46:39,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:46:39,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:46:39,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:46:39,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:46:39,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:46:39,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:46:39,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:46:39,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:46:39,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:46:39,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:46:39,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:46:39,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:46:39,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:46:39,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:46:39,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:46:39,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:46:39,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:46:39,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:46:39,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:46:39,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:46:39,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:46:39,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:46:39,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:46:39,857 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:46:39,858 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:46:39,859 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-16 10:46:39,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0eb3b2b1/d4bc75ade687437db24d654c7a807c8e/FLAGdb9db67a7 [2020-10-16 10:46:40,457 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:46:40,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/indexer.i [2020-10-16 10:46:40,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0eb3b2b1/d4bc75ade687437db24d654c7a807c8e/FLAGdb9db67a7 [2020-10-16 10:46:40,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0eb3b2b1/d4bc75ade687437db24d654c7a807c8e [2020-10-16 10:46:40,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:46:40,734 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:46:40,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:40,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:46:40,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:46:40,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45090060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:40, skipping insertion in model container [2020-10-16 10:46:40,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:46:40,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:46:41,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,519 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:46:41,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,706 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:46:41,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41 WrapperNode [2020-10-16 10:46:41,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:41,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:46:41,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:46:41,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:46:41,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:46:41,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:46:41,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:46:41,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:46:41,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:46:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 10:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-16 10:46:41,900 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-16 10:46:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:46:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-16 10:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:46:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:46:41,905 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:46:42,354 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:46:42,355 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-16 10:46:42,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:42 BoogieIcfgContainer [2020-10-16 10:46:42,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:46:42,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:46:42,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:46:42,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:46:42,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:46:40" (1/3) ... [2020-10-16 10:46:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444e853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:42, skipping insertion in model container [2020-10-16 10:46:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (2/3) ... [2020-10-16 10:46:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444e853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:42, skipping insertion in model container [2020-10-16 10:46:42,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:42" (3/3) ... [2020-10-16 10:46:42,367 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-16 10:46:42,377 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:46:42,377 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:46:42,385 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:46:42,386 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:46:42,418 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,419 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,419 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,419 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,420 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,420 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,421 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,421 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,421 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,421 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,421 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,422 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,422 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,422 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,423 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,423 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,423 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,423 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,424 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,424 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,424 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,424 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,425 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,425 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,425 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,425 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,426 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,426 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,426 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,426 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,427 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,427 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,427 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,428 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,428 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,428 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,428 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,429 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,429 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,429 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,429 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,430 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,430 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,430 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,430 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,430 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,431 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,431 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,431 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,431 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,432 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,432 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,432 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,432 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,433 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,433 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,433 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,433 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,434 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,434 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,434 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,434 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,435 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,435 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,435 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,435 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,436 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,436 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,436 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,436 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,437 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,437 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,437 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,437 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,438 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,438 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,438 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,439 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,439 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,439 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,439 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,440 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,440 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,440 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,440 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,441 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,441 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,445 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,445 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,445 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,446 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,446 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,446 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,446 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,447 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,447 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,447 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,447 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,448 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,448 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,448 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,448 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,449 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,449 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,449 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,449 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,450 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,450 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,450 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,450 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,451 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,451 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,466 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 10:46:42,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:46:42,501 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:46:42,502 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:46:42,502 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:46:42,502 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:46:42,502 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:46:42,502 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:46:42,502 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:46:42,503 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:46:42,518 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:46:42,536 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-16 10:46:42,539 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-16 10:46:42,541 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-16 10:46:42,603 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-16 10:46:42,603 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-16 10:46:42,611 INFO L80 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 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-16 10:46:42,615 INFO L117 LiptonReduction]: Number of co-enabled transitions 2652 [2020-10-16 10:46:44,671 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-16 10:46:44,883 INFO L132 LiptonReduction]: Checked pairs total: 2598 [2020-10-16 10:46:44,884 INFO L134 LiptonReduction]: Total number of compositions: 97 [2020-10-16 10:46:44,891 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-10-16 10:46:44,904 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-10-16 10:46:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-16 10:46:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-16 10:46:44,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,914 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:46:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,920 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-10-16 10:46:44,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589695615] [2020-10-16 10:46:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589695615] [2020-10-16 10:46:45,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:45,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:46:45,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787806804] [2020-10-16 10:46:45,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 10:46:45,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 10:46:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 10:46:45,131 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-10-16 10:46:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,188 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-10-16 10:46:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 10:46:45,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-16 10:46:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,201 INFO L225 Difference]: With dead ends: 61 [2020-10-16 10:46:45,202 INFO L226 Difference]: Without dead ends: 53 [2020-10-16 10:46:45,203 INFO L677 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 [2020-10-16 10:46:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-16 10:46:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-16 10:46:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:46:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-10-16 10:46:45,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-10-16 10:46:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,247 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-10-16 10:46:45,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 10:46:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-10-16 10:46:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:45,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:46:45,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:46:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-10-16 10:46:45,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027505032] [2020-10-16 10:46:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027505032] [2020-10-16 10:46:45,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647969568] [2020-10-16 10:46:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-10-16 10:46:45,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78969866] [2020-10-16 10:46:45,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:45,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:45,462 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 5 states. [2020-10-16 10:46:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,487 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2020-10-16 10:46:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 10:46:45,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,489 INFO L225 Difference]: With dead ends: 42 [2020-10-16 10:46:45,489 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 10:46:45,490 INFO L677 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 [2020-10-16 10:46:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 10:46:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 10:46:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:46:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2020-10-16 10:46:45,497 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2020-10-16 10:46:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,498 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2020-10-16 10:46:45,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2020-10-16 10:46:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,499 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 10:46:45,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:46:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2020-10-16 10:46:45,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256499689] [2020-10-16 10:46:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256499689] [2020-10-16 10:46:45,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885007417] [2020-10-16 10:46:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-16 10:46:45,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,897 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2020-10-16 10:46:45,900 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:46:45,927 INFO L625 ElimStorePlain]: treesize reduction 40, result has 24.5 percent of original size [2020-10-16 10:46:45,930 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 10:46:45,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-16 10:46:45,959 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-16 10:46:45,959 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:46:45,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 10:46:45,966 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 10:46:45,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-16 10:46:46,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-16 10:46:46,003 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:46:46,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 10:46:46,013 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 10:46:46,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-16 10:46:46,092 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-16 10:46:46,094 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:46:46,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 10:46:46,101 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 10:46:46,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-16 10:46:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:46:46,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:46:46,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2020-10-16 10:46:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370476910] [2020-10-16 10:46:46,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:46:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:46:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:46,119 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2020-10-16 10:46:54,263 WARN L193 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-16 10:47:02,369 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-16 10:47:07,814 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-16 10:47:11,874 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-16 10:47:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,800 INFO L93 Difference]: Finished difference Result 103 states and 211 transitions. [2020-10-16 10:47:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:24,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-16 10:47:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,804 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:47:24,805 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:47:24,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:47:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2020-10-16 10:47:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:47:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2020-10-16 10:47:24,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2020-10-16 10:47:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,817 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2020-10-16 10:47:24,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:47:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2020-10-16 10:47:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:47:24,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,019 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2020-10-16 10:47:25,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437736233] [2020-10-16 10:47:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 10:47:25,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437736233] [2020-10-16 10:47:25,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615632039] [2020-10-16 10:47:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 10:47:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-16 10:47:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901655729] [2020-10-16 10:47:25,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:47:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:47:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:47:25,161 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 6 states. [2020-10-16 10:47:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,181 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2020-10-16 10:47:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:47:25,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-16 10:47:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,183 INFO L225 Difference]: With dead ends: 53 [2020-10-16 10:47:25,183 INFO L226 Difference]: Without dead ends: 53 [2020-10-16 10:47:25,183 INFO L677 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 [2020-10-16 10:47:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-16 10:47:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-16 10:47:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:47:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-10-16 10:47:25,190 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2020-10-16 10:47:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,190 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-10-16 10:47:25,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:47:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-10-16 10:47:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:25,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,192 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2020-10-16 10:47:25,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183950726] [2020-10-16 10:47:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 10:47:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183950726] [2020-10-16 10:47:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237265114] [2020-10-16 10:47:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:25,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 10:47:25,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:47:25,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764999853] [2020-10-16 10:47:25,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:47:25,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:47:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:47:25,572 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2020-10-16 10:47:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,599 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2020-10-16 10:47:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:47:25,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-16 10:47:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,601 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:47:25,601 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:47:25,601 INFO L677 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 [2020-10-16 10:47:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:47:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-16 10:47:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:47:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2020-10-16 10:47:25,608 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2020-10-16 10:47:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,608 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2020-10-16 10:47:25,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:47:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2020-10-16 10:47:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:25,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,609 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:25,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2020-10-16 10:47:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8202389] [2020-10-16 10:47:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 10:47:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8202389] [2020-10-16 10:47:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749665632] [2020-10-16 10:47:25,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:26,040 INFO L384 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 [2020-10-16 10:47:26,040 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:47:26,046 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 10:47:26,047 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 10:47:26,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2020-10-16 10:47:26,067 INFO L384 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 [2020-10-16 10:47:26,068 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 10:47:26,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 10:47:26,075 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 10:47:26,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-16 10:47:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-16 10:47:26,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:47:26,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2020-10-16 10:47:26,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516093079] [2020-10-16 10:47:26,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:47:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:47:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:47:26,090 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 7 states. [2020-10-16 10:47:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:26,280 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2020-10-16 10:47:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:47:26,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-16 10:47:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:26,286 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:47:26,286 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:47:26,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:47:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2020-10-16 10:47:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:47:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2020-10-16 10:47:26,293 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2020-10-16 10:47:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:26,293 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2020-10-16 10:47:26,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:47:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2020-10-16 10:47:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:26,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:26,295 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:26,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 10:47:26,509 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2020-10-16 10:47:26,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:26,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115380880] [2020-10-16 10:47:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115380880] [2020-10-16 10:47:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905123082] [2020-10-16 10:47:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 10:47:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:26,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:26,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:47:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817745137] [2020-10-16 10:47:26,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:47:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:47:26,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:47:26,697 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 8 states. [2020-10-16 10:47:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:26,724 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2020-10-16 10:47:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:47:26,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 10:47:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:26,726 INFO L225 Difference]: With dead ends: 50 [2020-10-16 10:47:26,726 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:47:26,727 INFO L677 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 [2020-10-16 10:47:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:47:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-16 10:47:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:47:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2020-10-16 10:47:26,740 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2020-10-16 10:47:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:26,741 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2020-10-16 10:47:26,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:47:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2020-10-16 10:47:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:47:26,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:26,742 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:26,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:26,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2020-10-16 10:47:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:26,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495755066] [2020-10-16 10:47:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495755066] [2020-10-16 10:47:27,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31996245] [2020-10-16 10:47:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:47:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181488489] [2020-10-16 10:47:27,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:47:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:47:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:47:27,087 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 9 states. [2020-10-16 10:47:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,122 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2020-10-16 10:47:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:47:27,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-16 10:47:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,123 INFO L225 Difference]: With dead ends: 51 [2020-10-16 10:47:27,123 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 10:47:27,124 INFO L677 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 [2020-10-16 10:47:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 10:47:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-16 10:47:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:47:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2020-10-16 10:47:27,128 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2020-10-16 10:47:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2020-10-16 10:47:27,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:47:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2020-10-16 10:47:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:47:27,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,130 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:27,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2020-10-16 10:47:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604101019] [2020-10-16 10:47:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604101019] [2020-10-16 10:47:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331596349] [2020-10-16 10:47:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:47:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:47:27,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815468879] [2020-10-16 10:47:27,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:47:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:47:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:47:27,526 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 10 states. [2020-10-16 10:47:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,550 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2020-10-16 10:47:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:27,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-16 10:47:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,552 INFO L225 Difference]: With dead ends: 52 [2020-10-16 10:47:27,553 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 10:47:27,553 INFO L677 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 [2020-10-16 10:47:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 10:47:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-16 10:47:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:47:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-16 10:47:27,558 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2020-10-16 10:47:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,558 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-16 10:47:27,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:47:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-16 10:47:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:47:27,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,559 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 10:47:27,764 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,765 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2020-10-16 10:47:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629780550] [2020-10-16 10:47:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629780550] [2020-10-16 10:47:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071639005] [2020-10-16 10:47:27,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:27,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:47:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810146834] [2020-10-16 10:47:27,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:47:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:47:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:47:27,926 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 11 states. [2020-10-16 10:47:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,949 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2020-10-16 10:47:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:27,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-10-16 10:47:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,951 INFO L225 Difference]: With dead ends: 53 [2020-10-16 10:47:27,951 INFO L226 Difference]: Without dead ends: 53 [2020-10-16 10:47:27,951 INFO L677 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 [2020-10-16 10:47:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-16 10:47:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-16 10:47:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:47:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2020-10-16 10:47:27,955 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2020-10-16 10:47:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,955 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2020-10-16 10:47:27,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:47:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2020-10-16 10:47:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:47:27,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,957 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,169 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2020-10-16 10:47:28,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014672023] [2020-10-16 10:47:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:28,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014672023] [2020-10-16 10:47:28,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143974779] [2020-10-16 10:47:28,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:28,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:47:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:28,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:47:28,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713725651] [2020-10-16 10:47:28,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:47:28,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:47:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:47:28,386 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 12 states. [2020-10-16 10:47:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,411 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2020-10-16 10:47:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:28,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-10-16 10:47:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,412 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:47:28,412 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:47:28,413 INFO L677 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 [2020-10-16 10:47:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:47:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-16 10:47:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:47:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2020-10-16 10:47:28,416 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2020-10-16 10:47:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,417 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2020-10-16 10:47:28,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:47:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2020-10-16 10:47:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:47:28,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,418 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,629 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2020-10-16 10:47:28,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745562928] [2020-10-16 10:47:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:28,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745562928] [2020-10-16 10:47:28,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796613234] [2020-10-16 10:47:28,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:28,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:47:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:28,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:47:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110854978] [2020-10-16 10:47:28,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:28,854 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 13 states. [2020-10-16 10:47:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,882 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2020-10-16 10:47:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:28,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-10-16 10:47:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,884 INFO L225 Difference]: With dead ends: 55 [2020-10-16 10:47:28,884 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:47:28,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:47:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-16 10:47:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:47:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2020-10-16 10:47:28,908 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2020-10-16 10:47:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,908 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2020-10-16 10:47:28,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2020-10-16 10:47:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:47:28,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,909 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 10:47:29,121 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2020-10-16 10:47:29,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184354858] [2020-10-16 10:47:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184354858] [2020-10-16 10:47:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911646448] [2020-10-16 10:47:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:29,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:47:29,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448966166] [2020-10-16 10:47:29,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:47:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:47:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:47:29,333 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 14 states. [2020-10-16 10:47:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,366 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2020-10-16 10:47:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:29,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-10-16 10:47:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,368 INFO L225 Difference]: With dead ends: 56 [2020-10-16 10:47:29,368 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 10:47:29,369 INFO L677 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 [2020-10-16 10:47:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 10:47:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-16 10:47:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:47:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2020-10-16 10:47:29,373 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2020-10-16 10:47:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,374 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2020-10-16 10:47:29,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:47:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2020-10-16 10:47:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:47:29,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,380 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:47:29,591 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2020-10-16 10:47:29,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414611896] [2020-10-16 10:47:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414611896] [2020-10-16 10:47:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678751174] [2020-10-16 10:47:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:29,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:29,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:47:29,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956446990] [2020-10-16 10:47:29,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,830 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 15 states. [2020-10-16 10:47:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,865 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2020-10-16 10:47:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:29,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-10-16 10:47:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,866 INFO L225 Difference]: With dead ends: 57 [2020-10-16 10:47:29,866 INFO L226 Difference]: Without dead ends: 57 [2020-10-16 10:47:29,867 INFO L677 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 [2020-10-16 10:47:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-16 10:47:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-16 10:47:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:47:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2020-10-16 10:47:29,870 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2020-10-16 10:47:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,871 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2020-10-16 10:47:29,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2020-10-16 10:47:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:47:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,872 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 10:47:30,081 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2020-10-16 10:47:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122598711] [2020-10-16 10:47:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:30,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122598711] [2020-10-16 10:47:30,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271341521] [2020-10-16 10:47:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:30,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:47:30,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:30,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:30,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:47:30,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387455389] [2020-10-16 10:47:30,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:47:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:47:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:30,490 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 16 states. [2020-10-16 10:47:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:30,533 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2020-10-16 10:47:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:30,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-10-16 10:47:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:30,534 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:47:30,535 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 10:47:30,535 INFO L677 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 [2020-10-16 10:47:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 10:47:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-16 10:47:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:47:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2020-10-16 10:47:30,541 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2020-10-16 10:47:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:30,546 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2020-10-16 10:47:30,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:47:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2020-10-16 10:47:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:47:30,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:30,547 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,759 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2020-10-16 10:47:30,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756231135] [2020-10-16 10:47:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:30,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756231135] [2020-10-16 10:47:30,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451748746] [2020-10-16 10:47:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:30,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:47:31,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744770037] [2020-10-16 10:47:31,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:47:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:47:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:31,017 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 17 states. [2020-10-16 10:47:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,056 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2020-10-16 10:47:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:31,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-10-16 10:47:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,057 INFO L225 Difference]: With dead ends: 59 [2020-10-16 10:47:31,057 INFO L226 Difference]: Without dead ends: 59 [2020-10-16 10:47:31,058 INFO L677 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 [2020-10-16 10:47:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-16 10:47:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-16 10:47:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:47:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2020-10-16 10:47:31,062 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2020-10-16 10:47:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,062 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2020-10-16 10:47:31,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:47:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2020-10-16 10:47:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:47:31,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,063 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:47:31,277 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2020-10-16 10:47:31,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364462813] [2020-10-16 10:47:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364462813] [2020-10-16 10:47:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975436273] [2020-10-16 10:47:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:31,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:47:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:31,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:47:31,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80255597] [2020-10-16 10:47:31,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:47:31,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:47:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:31,659 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 18 states. [2020-10-16 10:47:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,691 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2020-10-16 10:47:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:31,692 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-10-16 10:47:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,693 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:47:31,693 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:47:31,693 INFO L677 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 [2020-10-16 10:47:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:47:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-16 10:47:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:47:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2020-10-16 10:47:31,696 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2020-10-16 10:47:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2020-10-16 10:47:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:47:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2020-10-16 10:47:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:47:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,697 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:47:31,898 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2020-10-16 10:47:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414105592] [2020-10-16 10:47:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414105592] [2020-10-16 10:47:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291960969] [2020-10-16 10:47:32,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:32,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:47:32,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:47:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:32,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:32,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:47:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68257081] [2020-10-16 10:47:32,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:47:32,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:32,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:47:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:32,500 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 19 states. [2020-10-16 10:47:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:32,535 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2020-10-16 10:47:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:47:32,538 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-10-16 10:47:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:32,539 INFO L225 Difference]: With dead ends: 61 [2020-10-16 10:47:32,539 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:47:32,540 INFO L677 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 [2020-10-16 10:47:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:47:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-16 10:47:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:47:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2020-10-16 10:47:32,543 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2020-10-16 10:47:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:32,543 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2020-10-16 10:47:32,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:47:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2020-10-16 10:47:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:47:32,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:32,544 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:32,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:47:32,755 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2020-10-16 10:47:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:32,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160277859] [2020-10-16 10:47:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:32,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160277859] [2020-10-16 10:47:32,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651839686] [2020-10-16 10:47:32,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:33,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:47:33,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009271386] [2020-10-16 10:47:33,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:47:33,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:47:33,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:33,111 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 20 states. [2020-10-16 10:47:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,158 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2020-10-16 10:47:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:33,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-10-16 10:47:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,160 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:47:33,160 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:47:33,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:47:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-16 10:47:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:47:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2020-10-16 10:47:33,164 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2020-10-16 10:47:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,165 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2020-10-16 10:47:33,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:47:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2020-10-16 10:47:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:47:33,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,166 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:33,380 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,381 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2020-10-16 10:47:33,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898982186] [2020-10-16 10:47:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:33,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898982186] [2020-10-16 10:47:33,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943850847] [2020-10-16 10:47:33,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:33,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:33,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:47:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780146643] [2020-10-16 10:47:33,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:47:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:47:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:33,821 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 21 states. [2020-10-16 10:47:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,870 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-10-16 10:47:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:47:33,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-10-16 10:47:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,872 INFO L225 Difference]: With dead ends: 63 [2020-10-16 10:47:33,872 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:47:33,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:47:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-16 10:47:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:47:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2020-10-16 10:47:33,876 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2020-10-16 10:47:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,877 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2020-10-16 10:47:33,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:47:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2020-10-16 10:47:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:47:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,878 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:34,089 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2020-10-16 10:47:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848958648] [2020-10-16 10:47:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848958648] [2020-10-16 10:47:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212164331] [2020-10-16 10:47:34,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:34,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:47:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:47:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:34,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:34,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:47:34,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608443441] [2020-10-16 10:47:34,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:47:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:47:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:34,616 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 22 states. [2020-10-16 10:47:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,657 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2020-10-16 10:47:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:34,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-10-16 10:47:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,659 INFO L225 Difference]: With dead ends: 64 [2020-10-16 10:47:34,659 INFO L226 Difference]: Without dead ends: 64 [2020-10-16 10:47:34,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-16 10:47:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-16 10:47:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:47:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2020-10-16 10:47:34,662 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2020-10-16 10:47:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,663 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2020-10-16 10:47:34,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:47:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2020-10-16 10:47:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:47:34,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,664 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 10:47:34,874 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,874 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2020-10-16 10:47:34,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660302952] [2020-10-16 10:47:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:35,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660302952] [2020-10-16 10:47:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113204068] [2020-10-16 10:47:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:35,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:35,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:35,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:47:35,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680846394] [2020-10-16 10:47:35,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:47:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:47:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:35,268 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 23 states. [2020-10-16 10:47:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:35,310 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2020-10-16 10:47:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:47:35,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-10-16 10:47:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:35,312 INFO L225 Difference]: With dead ends: 65 [2020-10-16 10:47:35,312 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 10:47:35,312 INFO L677 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 [2020-10-16 10:47:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 10:47:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-16 10:47:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:47:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2020-10-16 10:47:35,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2020-10-16 10:47:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:35,315 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2020-10-16 10:47:35,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:47:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2020-10-16 10:47:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 10:47:35,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:35,316 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 10:47:35,517 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2020-10-16 10:47:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188879261] [2020-10-16 10:47:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:35,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188879261] [2020-10-16 10:47:35,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207934866] [2020-10-16 10:47:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:36,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 10:47:36,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:36,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:47:36,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179256004] [2020-10-16 10:47:36,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:47:36,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:47:36,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:47:36,199 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 24 states. [2020-10-16 10:47:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,238 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2020-10-16 10:47:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:47:36,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-10-16 10:47:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,239 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:47:36,240 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 10:47:36,240 INFO L677 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 [2020-10-16 10:47:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 10:47:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-16 10:47:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:47:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2020-10-16 10:47:36,243 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2020-10-16 10:47:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,243 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2020-10-16 10:47:36,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:47:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2020-10-16 10:47:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 10:47:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,244 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:36,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,445 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:36,445 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2020-10-16 10:47:36,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:36,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946127140] [2020-10-16 10:47:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946127140] [2020-10-16 10:47:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839149369] [2020-10-16 10:47:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:37,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-16 10:47:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:37,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-16 10:47:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826609569] [2020-10-16 10:47:37,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:47:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:47:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:37,119 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 25 states. [2020-10-16 10:47:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:37,156 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2020-10-16 10:47:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:47:37,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-10-16 10:47:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:37,157 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:47:37,157 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:47:37,158 INFO L677 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 [2020-10-16 10:47:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:47:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-16 10:47:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:47:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2020-10-16 10:47:37,160 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2020-10-16 10:47:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:37,161 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2020-10-16 10:47:37,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:47:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2020-10-16 10:47:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 10:47:37,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:37,161 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 10:47:37,373 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2020-10-16 10:47:37,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999488610] [2020-10-16 10:47:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999488610] [2020-10-16 10:47:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818751253] [2020-10-16 10:47:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:37,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-16 10:47:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748438472] [2020-10-16 10:47:37,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 10:47:37,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 10:47:37,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:37,798 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 26 states. [2020-10-16 10:47:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:37,849 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2020-10-16 10:47:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:47:37,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-10-16 10:47:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:37,851 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:47:37,851 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:47:37,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:47:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-16 10:47:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:47:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2020-10-16 10:47:37,854 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2020-10-16 10:47:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:37,854 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2020-10-16 10:47:37,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 10:47:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2020-10-16 10:47:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 10:47:37,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:37,855 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:38,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:38,065 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2020-10-16 10:47:38,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:38,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612686214] [2020-10-16 10:47:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612686214] [2020-10-16 10:47:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355519062] [2020-10-16 10:47:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:38,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:38,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 10:47:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:38,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:38,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-16 10:47:38,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949813457] [2020-10-16 10:47:38,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 10:47:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 10:47:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:38,548 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 27 states. [2020-10-16 10:47:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,596 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-16 10:47:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:47:38,597 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-10-16 10:47:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,597 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:47:38,597 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:47:38,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:47:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-16 10:47:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:47:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2020-10-16 10:47:38,601 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2020-10-16 10:47:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,601 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2020-10-16 10:47:38,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 10:47:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2020-10-16 10:47:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 10:47:38,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,602 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:38,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:47:38,803 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2020-10-16 10:47:38,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:38,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856392925] [2020-10-16 10:47:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856392925] [2020-10-16 10:47:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582859762] [2020-10-16 10:47:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:41,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-16 10:47:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:41,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:41,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-16 10:47:41,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424623300] [2020-10-16 10:47:41,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 10:47:41,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:41,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 10:47:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:47:41,142 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 28 states. [2020-10-16 10:47:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:41,183 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-10-16 10:47:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:47:41,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-10-16 10:47:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:41,184 INFO L225 Difference]: With dead ends: 70 [2020-10-16 10:47:41,184 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:47:41,184 INFO L677 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 [2020-10-16 10:47:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:47:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-16 10:47:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:47:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2020-10-16 10:47:41,187 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2020-10-16 10:47:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:41,187 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2020-10-16 10:47:41,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 10:47:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2020-10-16 10:47:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-16 10:47:41,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:41,188 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:41,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 10:47:41,399 INFO L429 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2020-10-16 10:47:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:41,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788638305] [2020-10-16 10:47:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:41,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788638305] [2020-10-16 10:47:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017020935] [2020-10-16 10:47:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:41,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:42,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:42,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-16 10:47:42,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511078851] [2020-10-16 10:47:42,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 10:47:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 10:47:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:47:42,024 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 29 states. [2020-10-16 10:47:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:42,070 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-16 10:47:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:47:42,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2020-10-16 10:47:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:42,072 INFO L225 Difference]: With dead ends: 71 [2020-10-16 10:47:42,072 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:47:42,073 INFO L677 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 [2020-10-16 10:47:42,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:47:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-16 10:47:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:47:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2020-10-16 10:47:42,076 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2020-10-16 10:47:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:42,077 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2020-10-16 10:47:42,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 10:47:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2020-10-16 10:47:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 10:47:42,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:42,078 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:42,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:47:42,288 INFO L429 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2020-10-16 10:47:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:42,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166503744] [2020-10-16 10:47:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166503744] [2020-10-16 10:47:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462813617] [2020-10-16 10:47:42,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:43,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-16 10:47:43,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 10:47:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:43,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:43,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-16 10:47:43,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631668008] [2020-10-16 10:47:43,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 10:47:43,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 10:47:43,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:47:43,581 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 30 states. [2020-10-16 10:47:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:43,628 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2020-10-16 10:47:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:47:43,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-10-16 10:47:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:43,629 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:47:43,629 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:47:43,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:47:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:47:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-16 10:47:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:47:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2020-10-16 10:47:43,634 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2020-10-16 10:47:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:43,635 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2020-10-16 10:47:43,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 10:47:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2020-10-16 10:47:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-16 10:47:43,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:43,635 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:43,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:47:43,845 INFO L429 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2020-10-16 10:47:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:43,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849581451] [2020-10-16 10:47:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849581451] [2020-10-16 10:47:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778343191] [2020-10-16 10:47:44,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:51,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-16 10:47:51,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 10:47:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:51,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-16 10:47:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440890109] [2020-10-16 10:47:51,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-16 10:47:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:52,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-16 10:47:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:47:52,000 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 31 states. [2020-10-16 10:47:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:52,047 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2020-10-16 10:47:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:47:52,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2020-10-16 10:47:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:52,048 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:47:52,049 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:47:52,049 INFO L677 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 [2020-10-16 10:47:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:47:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-16 10:47:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:47:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-10-16 10:47:52,052 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2020-10-16 10:47:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:52,053 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-10-16 10:47:52,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-16 10:47:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-10-16 10:47:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-16 10:47:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:52,054 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:52,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:52,263 INFO L429 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2020-10-16 10:47:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719232126] [2020-10-16 10:47:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719232126] [2020-10-16 10:47:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631816673] [2020-10-16 10:47:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-16 10:47:52,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:52,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:52,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-16 10:47:52,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165065307] [2020-10-16 10:47:52,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-16 10:47:52,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-16 10:47:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:47:52,922 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 32 states. [2020-10-16 10:47:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:52,971 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-16 10:47:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:47:52,972 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2020-10-16 10:47:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:52,973 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:47:52,973 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:47:52,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:47:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:47:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-16 10:47:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:47:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2020-10-16 10:47:52,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2020-10-16 10:47:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:52,978 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2020-10-16 10:47:52,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-16 10:47:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2020-10-16 10:47:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-16 10:47:52,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:52,978 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:53,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:53,189 INFO L429 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2020-10-16 10:47:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:53,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443053106] [2020-10-16 10:47:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:53,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443053106] [2020-10-16 10:47:53,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335971422] [2020-10-16 10:47:53,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:53,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-16 10:47:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:53,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:53,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-16 10:47:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663259668] [2020-10-16 10:47:53,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-16 10:47:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-16 10:47:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:47:53,809 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 33 states. [2020-10-16 10:47:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:53,864 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2020-10-16 10:47:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:47:53,865 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2020-10-16 10:47:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:53,866 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:47:53,866 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:47:53,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:47:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:47:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-16 10:47:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:47:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2020-10-16 10:47:53,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2020-10-16 10:47:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:53,870 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2020-10-16 10:47:53,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-16 10:47:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2020-10-16 10:47:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-16 10:47:53,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:53,871 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:47:54,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:54,082 INFO L429 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:47:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2020-10-16 10:47:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:54,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535949569] [2020-10-16 10:47:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:47:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535949569] [2020-10-16 10:47:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697662044] [2020-10-16 10:47:54,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:03,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-16 10:48:03,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-16 10:48:03,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:03,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:03,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-16 10:48:03,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582164278] [2020-10-16 10:48:03,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-16 10:48:03,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:03,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-16 10:48:03,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:03,941 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 34 states. [2020-10-16 10:48:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:03,999 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2020-10-16 10:48:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:48:03,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-10-16 10:48:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:04,000 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:48:04,000 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 10:48:04,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 10:48:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-16 10:48:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:48:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2020-10-16 10:48:04,004 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2020-10-16 10:48:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:04,004 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2020-10-16 10:48:04,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-16 10:48:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2020-10-16 10:48:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-16 10:48:04,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:04,005 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:04,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 10:48:04,215 INFO L429 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2020-10-16 10:48:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:04,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215049234] [2020-10-16 10:48:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215049234] [2020-10-16 10:48:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496062857] [2020-10-16 10:48:04,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:04,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:04,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-16 10:48:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:04,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:04,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-16 10:48:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725805064] [2020-10-16 10:48:04,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-16 10:48:04,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-16 10:48:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:48:04,920 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 35 states. [2020-10-16 10:48:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:04,975 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2020-10-16 10:48:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:48:04,976 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2020-10-16 10:48:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:04,976 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:48:04,976 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:48:04,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:48:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:48:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-16 10:48:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:48:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2020-10-16 10:48:04,979 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2020-10-16 10:48:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:04,979 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2020-10-16 10:48:04,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-16 10:48:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2020-10-16 10:48:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 10:48:04,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:04,980 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:05,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:05,180 INFO L429 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2020-10-16 10:48:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:05,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418183810] [2020-10-16 10:48:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418183810] [2020-10-16 10:48:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611834573] [2020-10-16 10:48:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:15,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-16 10:48:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-16 10:48:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:15,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-16 10:48:15,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317094442] [2020-10-16 10:48:15,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-16 10:48:15,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:15,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-16 10:48:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:48:15,855 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 36 states. [2020-10-16 10:48:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:15,901 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2020-10-16 10:48:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:48:15,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-10-16 10:48:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:15,902 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:48:15,903 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:48:15,904 INFO L677 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 [2020-10-16 10:48:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:48:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-16 10:48:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:48:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2020-10-16 10:48:15,906 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2020-10-16 10:48:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:15,907 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2020-10-16 10:48:15,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-16 10:48:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2020-10-16 10:48:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-16 10:48:15,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:15,907 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:16,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 10:48:16,117 INFO L429 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2020-10-16 10:48:16,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:16,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652906195] [2020-10-16 10:48:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:16,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652906195] [2020-10-16 10:48:16,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822863632] [2020-10-16 10:48:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:28,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-16 10:48:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:28,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-16 10:48:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:28,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:28,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-16 10:48:28,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114324949] [2020-10-16 10:48:28,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-16 10:48:28,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-16 10:48:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:48:28,389 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 37 states. [2020-10-16 10:48:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:28,443 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2020-10-16 10:48:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:48:28,444 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-10-16 10:48:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:28,445 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:48:28,445 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:48:28,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:48:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:48:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-16 10:48:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:48:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2020-10-16 10:48:28,449 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2020-10-16 10:48:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2020-10-16 10:48:28,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-16 10:48:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2020-10-16 10:48:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-16 10:48:28,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:28,450 INFO L422 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:28,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:28,661 INFO L429 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2020-10-16 10:48:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349339417] [2020-10-16 10:48:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349339417] [2020-10-16 10:48:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832240188] [2020-10-16 10:48:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-16 10:48:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:29,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:29,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-16 10:48:29,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492395846] [2020-10-16 10:48:29,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-16 10:48:29,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-16 10:48:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:48:29,585 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 38 states. [2020-10-16 10:48:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:29,638 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2020-10-16 10:48:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:48:29,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2020-10-16 10:48:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:29,642 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:48:29,642 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:48:29,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:48:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:48:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-16 10:48:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:48:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2020-10-16 10:48:29,646 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2020-10-16 10:48:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:29,646 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2020-10-16 10:48:29,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-16 10:48:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2020-10-16 10:48:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-16 10:48:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:29,647 INFO L422 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:29,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:48:29,848 INFO L429 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2020-10-16 10:48:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:29,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387124492] [2020-10-16 10:48:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:30,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387124492] [2020-10-16 10:48:30,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137311325] [2020-10-16 10:48:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:30,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:30,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-16 10:48:30,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:30,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:30,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-16 10:48:30,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493507413] [2020-10-16 10:48:30,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-16 10:48:30,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-16 10:48:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:48:30,702 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 39 states. [2020-10-16 10:48:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:30,760 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2020-10-16 10:48:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:48:30,761 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-10-16 10:48:30,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:30,762 INFO L225 Difference]: With dead ends: 81 [2020-10-16 10:48:30,762 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:48:30,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:48:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:48:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-16 10:48:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:48:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2020-10-16 10:48:30,766 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2020-10-16 10:48:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:30,766 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2020-10-16 10:48:30,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-16 10:48:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2020-10-16 10:48:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-16 10:48:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:30,767 INFO L422 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:30,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 10:48:30,978 INFO L429 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2020-10-16 10:48:30,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:30,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704462372] [2020-10-16 10:48:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:31,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704462372] [2020-10-16 10:48:31,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693829117] [2020-10-16 10:48:31,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:34,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-16 10:48:34,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:34,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-16 10:48:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:34,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:34,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-16 10:48:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392199797] [2020-10-16 10:48:34,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-16 10:48:34,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-16 10:48:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:48:34,786 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 40 states. [2020-10-16 10:48:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:34,832 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-10-16 10:48:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:48:34,832 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2020-10-16 10:48:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:34,833 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:48:34,833 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:48:34,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:48:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:48:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-16 10:48:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:48:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2020-10-16 10:48:34,835 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2020-10-16 10:48:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:34,836 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2020-10-16 10:48:34,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-16 10:48:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2020-10-16 10:48:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-16 10:48:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:34,841 INFO L422 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:35,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:48:35,050 INFO L429 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2020-10-16 10:48:35,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:35,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358746560] [2020-10-16 10:48:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:36,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358746560] [2020-10-16 10:48:36,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625182183] [2020-10-16 10:48:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:36,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:36,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-16 10:48:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:36,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:36,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-16 10:48:36,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360908519] [2020-10-16 10:48:36,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-16 10:48:36,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-16 10:48:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:48:36,329 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 41 states. [2020-10-16 10:48:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:36,403 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2020-10-16 10:48:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:48:36,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2020-10-16 10:48:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:36,405 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:48:36,405 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:48:36,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:48:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:48:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-16 10:48:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:48:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2020-10-16 10:48:36,408 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2020-10-16 10:48:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:36,409 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2020-10-16 10:48:36,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-16 10:48:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2020-10-16 10:48:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 10:48:36,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:36,410 INFO L422 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:36,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:48:36,610 INFO L429 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:36,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2020-10-16 10:48:36,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:36,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900196554] [2020-10-16 10:48:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900196554] [2020-10-16 10:48:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826512493] [2020-10-16 10:48:37,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:55,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-16 10:48:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-16 10:48:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:55,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:55,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-16 10:48:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439541956] [2020-10-16 10:48:55,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-16 10:48:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-16 10:48:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:48:55,331 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 42 states. [2020-10-16 10:48:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:55,391 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2020-10-16 10:48:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:48:55,392 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2020-10-16 10:48:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:55,393 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:48:55,393 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:48:55,394 INFO L677 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 [2020-10-16 10:48:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:48:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-16 10:48:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:48:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2020-10-16 10:48:55,396 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2020-10-16 10:48:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:55,397 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2020-10-16 10:48:55,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-16 10:48:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2020-10-16 10:48:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-16 10:48:55,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:55,398 INFO L422 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:48:55,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:55,607 INFO L429 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:48:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:55,607 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2020-10-16 10:48:55,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:55,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042476923] [2020-10-16 10:48:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:48:56,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042476923] [2020-10-16 10:48:56,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225806837] [2020-10-16 10:48:56,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:00,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-10-16 10:49:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:00,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-16 10:49:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:00,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:00,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-16 10:49:00,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925346607] [2020-10-16 10:49:00,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-16 10:49:00,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-16 10:49:00,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:49:00,639 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 43 states. [2020-10-16 10:49:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:00,707 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2020-10-16 10:49:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 10:49:00,708 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 48 [2020-10-16 10:49:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:00,709 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:49:00,709 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:49:00,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:49:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:49:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-16 10:49:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:49:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2020-10-16 10:49:00,713 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2020-10-16 10:49:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:00,714 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2020-10-16 10:49:00,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-16 10:49:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2020-10-16 10:49:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-16 10:49:00,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:00,715 INFO L422 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:49:00,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:49:00,922 INFO L429 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:49:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2020-10-16 10:49:00,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:00,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053602799] [2020-10-16 10:49:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:01,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053602799] [2020-10-16 10:49:01,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155251877] [2020-10-16 10:49:01,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-16 10:49:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:02,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:02,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-16 10:49:02,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474451892] [2020-10-16 10:49:02,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-16 10:49:02,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-16 10:49:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:49:02,042 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 44 states. [2020-10-16 10:49:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:02,100 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2020-10-16 10:49:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 10:49:02,101 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2020-10-16 10:49:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:02,102 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:49:02,102 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:49:02,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:49:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:49:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-16 10:49:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:49:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2020-10-16 10:49:02,106 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2020-10-16 10:49:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:02,108 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2020-10-16 10:49:02,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-16 10:49:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2020-10-16 10:49:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-16 10:49:02,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:02,109 INFO L422 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:49:02,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:02,320 INFO L429 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:49:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2020-10-16 10:49:02,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:02,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992821837] [2020-10-16 10:49:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:03,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992821837] [2020-10-16 10:49:03,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397072399] [2020-10-16 10:49:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:03,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:03,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-16 10:49:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:03,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:03,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-10-16 10:49:03,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130605443] [2020-10-16 10:49:03,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-16 10:49:03,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-16 10:49:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:49:03,424 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 45 states. [2020-10-16 10:49:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:03,484 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2020-10-16 10:49:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 10:49:03,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2020-10-16 10:49:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:03,486 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:49:03,486 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:49:03,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:49:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:49:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-16 10:49:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:49:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2020-10-16 10:49:03,491 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2020-10-16 10:49:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:03,491 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2020-10-16 10:49:03,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-16 10:49:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2020-10-16 10:49:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-16 10:49:03,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:03,492 INFO L422 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:49:03,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:03,704 INFO L429 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:49:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2020-10-16 10:49:03,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:03,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296615882] [2020-10-16 10:49:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:04,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296615882] [2020-10-16 10:49:04,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600254432] [2020-10-16 10:49:04,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:10,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-16 10:49:10,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-16 10:49:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:10,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:10,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-10-16 10:49:10,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564277812] [2020-10-16 10:49:10,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-16 10:49:10,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-16 10:49:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:49:10,817 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 46 states. [2020-10-16 10:49:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:10,882 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2020-10-16 10:49:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-16 10:49:10,883 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2020-10-16 10:49:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:10,884 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:49:10,884 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:49:10,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:49:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:49:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-16 10:49:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:49:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-10-16 10:49:10,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2020-10-16 10:49:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:10,888 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-10-16 10:49:10,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-16 10:49:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-10-16 10:49:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-16 10:49:10,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:10,889 INFO L422 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:49:11,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 10:49:11,089 INFO L429 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:49:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:11,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2020-10-16 10:49:11,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:11,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573097056] [2020-10-16 10:49:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:12,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573097056] [2020-10-16 10:49:12,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056557760] [2020-10-16 10:49:12,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:12,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-16 10:49:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:12,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:12,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-10-16 10:49:12,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941906623] [2020-10-16 10:49:12,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-16 10:49:12,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-16 10:49:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:49:12,358 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 47 states. [2020-10-16 10:49:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:12,437 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2020-10-16 10:49:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-16 10:49:12,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 52 [2020-10-16 10:49:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:12,439 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:49:12,439 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:49:12,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:49:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:49:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-16 10:49:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 10:49:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2020-10-16 10:49:12,443 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2020-10-16 10:49:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:12,443 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2020-10-16 10:49:12,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-16 10:49:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2020-10-16 10:49:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-16 10:49:12,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:12,444 INFO L422 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:49:12,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:49:12,654 INFO L429 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:49:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2020-10-16 10:49:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:12,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580033578] [2020-10-16 10:49:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:49:13,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580033578] [2020-10-16 10:49:13,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401099750] [2020-10-16 10:49:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:03,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-10-16 10:50:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-16 10:50:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:50:04,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:04,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-10-16 10:50:04,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972434446] [2020-10-16 10:50:04,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-16 10:50:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:04,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-16 10:50:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:50:04,552 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 48 states. [2020-10-16 10:50:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:04,624 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2020-10-16 10:50:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 10:50:04,627 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2020-10-16 10:50:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:04,628 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:50:04,628 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:50:04,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:50:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:50:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-16 10:50:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 10:50:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2020-10-16 10:50:04,632 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2020-10-16 10:50:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:04,632 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2020-10-16 10:50:04,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-16 10:50:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2020-10-16 10:50:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-16 10:50:04,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:04,633 INFO L422 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 10:50:04,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 10:50:04,842 INFO L429 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 10:50:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2020-10-16 10:50:04,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:04,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780821539] [2020-10-16 10:50:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 10:50:06,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780821539] [2020-10-16 10:50:06,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031172350] [2020-10-16 10:50:06,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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