/usr/bin/java -Xmx16000000000 -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-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 15:42:35,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 15:42:35,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 15:42:35,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 15:42:35,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 15:42:35,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 15:42:35,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 15:42:35,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 15:42:35,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 15:42:35,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 15:42:35,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 15:42:35,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 15:42:35,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 15:42:35,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 15:42:35,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 15:42:35,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 15:42:35,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 15:42:35,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 15:42:35,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 15:42:35,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 15:42:35,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 15:42:35,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 15:42:35,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 15:42:35,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 15:42:35,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 15:42:35,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 15:42:35,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 15:42:35,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 15:42:35,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 15:42:35,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 15:42:35,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 15:42:35,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 15:42:35,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 15:42:35,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 15:42:35,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 15:42:35,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 15:42:35,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 15:42:35,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 15:42:35,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 15:42:35,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 15:42:35,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 15:42:35,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 15:42:35,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 15:42:35,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 15:42:35,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 15:42:35,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 15:42:35,510 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 15:42:35,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 15:42:35,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 15:42:35,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 15:42:35,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 15:42:35,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 15:42:35,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 15:42:35,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 15:42:35,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 15:42:35,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 15:42:35,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 15:42:35,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 15:42:35,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 15:42:35,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 15:42:35,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 15:42:35,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 15:42:35,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 15:42:35,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 15:42:35,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 15:42:35,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 15:42:35,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 15:42:35,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 15:42:35,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 15:42:35,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 15:42:35,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 15:42:35,869 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 15:42:35,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-11 15:42:35,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4eb8ba/9b070d4a9847459981d30f231771f3f0/FLAG1772a376b [2020-10-11 15:42:36,499 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 15:42:36,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-11 15:42:36,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4eb8ba/9b070d4a9847459981d30f231771f3f0/FLAG1772a376b [2020-10-11 15:42:36,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4eb8ba/9b070d4a9847459981d30f231771f3f0 [2020-10-11 15:42:36,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 15:42:36,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 15:42:36,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 15:42:36,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 15:42:36,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 15:42:36,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:42:36" (1/1) ... [2020-10-11 15:42:36,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7574247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:36, skipping insertion in model container [2020-10-11 15:42:36,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:42:36" (1/1) ... [2020-10-11 15:42:36,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 15:42:36,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 15:42:37,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 15:42:37,452 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 15:42:37,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 15:42:37,745 INFO L208 MainTranslator]: Completed translation [2020-10-11 15:42:37,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37 WrapperNode [2020-10-11 15:42:37,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 15:42:37,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 15:42:37,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 15:42:37,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 15:42:37,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 15:42:37,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 15:42:37,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 15:42:37,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 15:42:37,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... [2020-10-11 15:42:37,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 15:42:37,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 15:42:37,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 15:42:37,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 15:42:37,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 15:42:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 15:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 15:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 15:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 15:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-11 15:42:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-11 15:42:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-11 15:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-11 15:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 15:42:37,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 15:42:37,927 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 15:42:38,353 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 15:42:38,353 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-11 15:42:38,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:42:38 BoogieIcfgContainer [2020-10-11 15:42:38,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 15:42:38,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 15:42:38,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 15:42:38,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 15:42:38,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:42:36" (1/3) ... [2020-10-11 15:42:38,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f7d0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:42:38, skipping insertion in model container [2020-10-11 15:42:38,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:42:37" (2/3) ... [2020-10-11 15:42:38,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f7d0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:42:38, skipping insertion in model container [2020-10-11 15:42:38,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:42:38" (3/3) ... [2020-10-11 15:42:38,365 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-11 15:42:38,376 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 15:42:38,377 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 15:42:38,385 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 15:42:38,386 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 15:42:38,410 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,411 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,411 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,411 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,412 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,412 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,412 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,413 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,413 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,413 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,413 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,414 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,414 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,415 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,415 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,415 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,415 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,416 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,416 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,416 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,416 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,416 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,417 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,420 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,421 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,421 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,421 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,422 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,422 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,422 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,422 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,423 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 15:42:38,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 15:42:38,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 15:42:38,470 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 15:42:38,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 15:42:38,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 15:42:38,471 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 15:42:38,471 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 15:42:38,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 15:42:38,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 15:42:38,485 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 15:42:38,488 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-11 15:42:38,491 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-11 15:42:38,493 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-11 15:42:38,540 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-11 15:42:38,540 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 15:42:38,546 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-11 15:42:38,548 INFO L117 LiptonReduction]: Number of co-enabled transitions 646 [2020-10-11 15:42:40,471 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-11 15:42:40,645 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-11 15:42:41,267 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-11 15:42:41,544 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-11 15:42:41,557 INFO L132 LiptonReduction]: Checked pairs total: 823 [2020-10-11 15:42:41,557 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-11 15:42:41,563 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-10-11 15:42:41,572 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-10-11 15:42:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-11 15:42:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 15:42:41,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:41,582 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:41,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-10-11 15:42:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:41,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121190953] [2020-10-11 15:42:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:41,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121190953] [2020-10-11 15:42:41,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 15:42:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 15:42:41,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352138928] [2020-10-11 15:42:41,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 15:42:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 15:42:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 15:42:41,831 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-11 15:42:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:41,869 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-10-11 15:42:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 15:42:41,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-11 15:42:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:41,882 INFO L225 Difference]: With dead ends: 52 [2020-10-11 15:42:41,882 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 15:42:41,883 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 15:42:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 15:42:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 15:42:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 15:42:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-10-11 15:42:41,923 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-10-11 15:42:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:41,924 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-10-11 15:42:41,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 15:42:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-10-11 15:42:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 15:42:41,925 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:41,925 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:41,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 15:42:41,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-10-11 15:42:41,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:41,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399497699] [2020-10-11 15:42:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399497699] [2020-10-11 15:42:42,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 15:42:42,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 15:42:42,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889773123] [2020-10-11 15:42:42,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 15:42:42,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 15:42:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 15:42:42,011 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-10-11 15:42:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:42,037 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-10-11 15:42:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 15:42:42,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-11 15:42:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:42,039 INFO L225 Difference]: With dead ends: 64 [2020-10-11 15:42:42,039 INFO L226 Difference]: Without dead ends: 64 [2020-10-11 15:42:42,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 15:42:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-11 15:42:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-11 15:42:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 15:42:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-10-11 15:42:42,056 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-10-11 15:42:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:42,057 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-10-11 15:42:42,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 15:42:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-10-11 15:42:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 15:42:42,058 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:42,058 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:42,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 15:42:42,058 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-10-11 15:42:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:42,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955331973] [2020-10-11 15:42:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:42,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955331973] [2020-10-11 15:42:42,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35927666] [2020-10-11 15:42:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-11 15:42:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:42,322 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 [2020-10-11 15:42:42,322 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 15:42:42,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 15:42:42,328 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 15:42:42,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-11 15:42:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:42,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 15:42:42,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-11 15:42:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29006374] [2020-10-11 15:42:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 15:42:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 15:42:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 15:42:42,345 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-10-11 15:42:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:42,364 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-10-11 15:42:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 15:42:42,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-11 15:42:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:42,366 INFO L225 Difference]: With dead ends: 40 [2020-10-11 15:42:42,366 INFO L226 Difference]: Without dead ends: 40 [2020-10-11 15:42:42,366 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 15:42:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-11 15:42:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-11 15:42:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 15:42:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-10-11 15:42:42,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-10-11 15:42:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:42,395 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-10-11 15:42:42,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 15:42:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-10-11 15:42:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 15:42:42,396 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:42,396 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:42,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-11 15:42:42,610 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-10-11 15:42:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:42,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294764527] [2020-10-11 15:42:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:42,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294764527] [2020-10-11 15:42:42,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746780471] [2020-10-11 15:42:42,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:42,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:42:42,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-11 15:42:42,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:42:42,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:42,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-11 15:42:42,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175165372] [2020-10-11 15:42:42,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 15:42:42,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 15:42:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 15:42:42,775 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-10-11 15:42:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:42,887 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-10-11 15:42:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 15:42:42,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-11 15:42:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:42,889 INFO L225 Difference]: With dead ends: 104 [2020-10-11 15:42:42,889 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 15:42:42,890 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-11 15:42:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 15:42:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-10-11 15:42:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 15:42:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-10-11 15:42:42,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-10-11 15:42:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:42,899 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-10-11 15:42:42,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 15:42:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-10-11 15:42:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 15:42:42,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:42,904 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:43,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:43,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-10-11 15:42:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:43,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68024015] [2020-10-11 15:42:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-11 15:42:43,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68024015] [2020-10-11 15:42:43,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380544667] [2020-10-11 15:42:43,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:43,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 15:42:43,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 15:42:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-11 15:42:43,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:43,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 15:42:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472158833] [2020-10-11 15:42:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 15:42:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 15:42:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 15:42:43,306 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 6 states. [2020-10-11 15:42:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:43,337 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2020-10-11 15:42:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 15:42:43,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-11 15:42:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:43,339 INFO L225 Difference]: With dead ends: 110 [2020-10-11 15:42:43,339 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 15:42:43,340 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 15:42:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 15:42:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-11 15:42:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 15:42:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-10-11 15:42:43,349 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 22 [2020-10-11 15:42:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:43,349 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-10-11 15:42:43,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 15:42:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-10-11 15:42:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 15:42:43,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:43,351 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:43,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:43,553 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2041399383, now seen corresponding path program 4 times [2020-10-11 15:42:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:43,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990114906] [2020-10-11 15:42:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 15:42:43,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990114906] [2020-10-11 15:42:43,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544333737] [2020-10-11 15:42:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:42:43,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:42:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 15:42:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 15:42:43,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:43,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 15:42:43,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440986959] [2020-10-11 15:42:43,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 15:42:43,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 15:42:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 15:42:43,705 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 6 states. [2020-10-11 15:42:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:43,731 INFO L93 Difference]: Finished difference Result 148 states and 220 transitions. [2020-10-11 15:42:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 15:42:43,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-11 15:42:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:43,733 INFO L225 Difference]: With dead ends: 148 [2020-10-11 15:42:43,733 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 15:42:43,733 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 15:42:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 15:42:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2020-10-11 15:42:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 15:42:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-10-11 15:42:43,743 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 25 [2020-10-11 15:42:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:43,743 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-10-11 15:42:43,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 15:42:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-10-11 15:42:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 15:42:43,745 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:43,745 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:43,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:43,961 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:43,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 5 times [2020-10-11 15:42:43,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:43,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993339601] [2020-10-11 15:42:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 15:42:44,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993339601] [2020-10-11 15:42:44,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970222518] [2020-10-11 15:42:44,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:44,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 15:42:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 15:42:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 15:42:44,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:44,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 15:42:44,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436037098] [2020-10-11 15:42:44,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 15:42:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 15:42:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-11 15:42:44,187 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-10-11 15:42:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:44,223 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-10-11 15:42:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 15:42:44,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-11 15:42:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:44,227 INFO L225 Difference]: With dead ends: 178 [2020-10-11 15:42:44,227 INFO L226 Difference]: Without dead ends: 178 [2020-10-11 15:42:44,228 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-11 15:42:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-11 15:42:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-10-11 15:42:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 15:42:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-10-11 15:42:44,248 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-10-11 15:42:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:44,251 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-10-11 15:42:44,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 15:42:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-10-11 15:42:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 15:42:44,255 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:44,255 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:44,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 15:42:44,471 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 6 times [2020-10-11 15:42:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:44,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204497261] [2020-10-11 15:42:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 15:42:44,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204497261] [2020-10-11 15:42:44,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935378917] [2020-10-11 15:42:44,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:44,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 15:42:44,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 15:42:44,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-11 15:42:44,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:44,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-11 15:42:44,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512564777] [2020-10-11 15:42:44,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 15:42:44,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 15:42:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 15:42:44,687 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 11 states. [2020-10-11 15:42:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:45,153 INFO L93 Difference]: Finished difference Result 266 states and 378 transitions. [2020-10-11 15:42:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 15:42:45,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-11 15:42:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:45,155 INFO L225 Difference]: With dead ends: 266 [2020-10-11 15:42:45,155 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 15:42:45,157 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-10-11 15:42:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 15:42:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2020-10-11 15:42:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-11 15:42:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 331 transitions. [2020-10-11 15:42:45,177 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 331 transitions. Word has length 33 [2020-10-11 15:42:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:45,177 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 331 transitions. [2020-10-11 15:42:45,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 15:42:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 331 transitions. [2020-10-11 15:42:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-11 15:42:45,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:45,181 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:45,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:45,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash -480954575, now seen corresponding path program 7 times [2020-10-11 15:42:45,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:45,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782937037] [2020-10-11 15:42:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 15:42:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782937037] [2020-10-11 15:42:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277184763] [2020-10-11 15:42:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 15:42:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 15:42:45,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:45,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 15:42:45,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738540481] [2020-10-11 15:42:45,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 15:42:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 15:42:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-11 15:42:45,606 INFO L87 Difference]: Start difference. First operand 229 states and 331 transitions. Second operand 9 states. [2020-10-11 15:42:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:45,644 INFO L93 Difference]: Finished difference Result 286 states and 407 transitions. [2020-10-11 15:42:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 15:42:45,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-11 15:42:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:45,647 INFO L225 Difference]: With dead ends: 286 [2020-10-11 15:42:45,647 INFO L226 Difference]: Without dead ends: 286 [2020-10-11 15:42:45,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-11 15:42:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-11 15:42:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 265. [2020-10-11 15:42:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-11 15:42:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-10-11 15:42:45,657 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 40 [2020-10-11 15:42:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:45,657 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-10-11 15:42:45,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 15:42:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-10-11 15:42:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-11 15:42:45,659 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:45,659 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:45,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:45,873 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 8 times [2020-10-11 15:42:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:45,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87293594] [2020-10-11 15:42:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 15:42:45,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87293594] [2020-10-11 15:42:45,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437167511] [2020-10-11 15:42:45,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:46,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:42:46,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:46,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 15:42:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 15:42:46,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:46,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 15:42:46,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591008909] [2020-10-11 15:42:46,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 15:42:46,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 15:42:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-11 15:42:46,061 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-10-11 15:42:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:46,092 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-10-11 15:42:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 15:42:46,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-11 15:42:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:46,095 INFO L225 Difference]: With dead ends: 322 [2020-10-11 15:42:46,095 INFO L226 Difference]: Without dead ends: 322 [2020-10-11 15:42:46,095 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-11 15:42:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-11 15:42:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-10-11 15:42:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-11 15:42:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-10-11 15:42:46,103 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-10-11 15:42:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:46,103 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-10-11 15:42:46,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 15:42:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-10-11 15:42:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-11 15:42:46,104 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:46,105 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:46,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 15:42:46,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 9 times [2020-10-11 15:42:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:46,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229585029] [2020-10-11 15:42:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 15:42:46,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229585029] [2020-10-11 15:42:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171098834] [2020-10-11 15:42:46,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 15:42:46,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 15:42:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-11 15:42:46,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:46,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-10-11 15:42:46,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780512819] [2020-10-11 15:42:46,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 15:42:46,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 15:42:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 15:42:46,559 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 15 states. [2020-10-11 15:42:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:47,496 INFO L93 Difference]: Finished difference Result 440 states and 606 transitions. [2020-10-11 15:42:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-11 15:42:47,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-11 15:42:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:47,500 INFO L225 Difference]: With dead ends: 440 [2020-10-11 15:42:47,501 INFO L226 Difference]: Without dead ends: 440 [2020-10-11 15:42:47,502 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 15:42:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-11 15:42:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 394. [2020-10-11 15:42:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-11 15:42:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2020-10-11 15:42:47,511 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 48 [2020-10-11 15:42:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:47,512 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2020-10-11 15:42:47,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 15:42:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2020-10-11 15:42:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-11 15:42:47,513 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:47,513 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:47,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:47,727 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash 314386685, now seen corresponding path program 10 times [2020-10-11 15:42:47,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:47,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032922257] [2020-10-11 15:42:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-11 15:42:47,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032922257] [2020-10-11 15:42:47,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936423009] [2020-10-11 15:42:47,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:42:47,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:42:47,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 15:42:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-11 15:42:47,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:47,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 15:42:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371052428] [2020-10-11 15:42:47,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 15:42:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 15:42:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-11 15:42:47,966 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 12 states. [2020-10-11 15:42:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:48,012 INFO L93 Difference]: Finished difference Result 460 states and 636 transitions. [2020-10-11 15:42:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 15:42:48,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-11 15:42:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:48,016 INFO L225 Difference]: With dead ends: 460 [2020-10-11 15:42:48,016 INFO L226 Difference]: Without dead ends: 460 [2020-10-11 15:42:48,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-11 15:42:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-11 15:42:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 436. [2020-10-11 15:42:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-11 15:42:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-10-11 15:42:48,026 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 55 [2020-10-11 15:42:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:48,026 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-10-11 15:42:48,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 15:42:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-10-11 15:42:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-11 15:42:48,028 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:48,028 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:48,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:48,242 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:48,243 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 11 times [2020-10-11 15:42:48,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701876816] [2020-10-11 15:42:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-11 15:42:48,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701876816] [2020-10-11 15:42:48,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420929379] [2020-10-11 15:42:48,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:48,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 15:42:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 15:42:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-11 15:42:48,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:48,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 15:42:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948179097] [2020-10-11 15:42:48,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 15:42:48,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 15:42:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 15:42:48,537 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-10-11 15:42:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:48,575 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-10-11 15:42:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 15:42:48,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-11 15:42:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:48,579 INFO L225 Difference]: With dead ends: 502 [2020-10-11 15:42:48,580 INFO L226 Difference]: Without dead ends: 502 [2020-10-11 15:42:48,580 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 15:42:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-11 15:42:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-10-11 15:42:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-11 15:42:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-10-11 15:42:48,591 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-10-11 15:42:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:48,592 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-10-11 15:42:48,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 15:42:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-10-11 15:42:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-11 15:42:48,594 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:48,594 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:48,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 15:42:48,808 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 12 times [2020-10-11 15:42:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:48,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189787118] [2020-10-11 15:42:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-11 15:42:48,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189787118] [2020-10-11 15:42:48,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500061402] [2020-10-11 15:42:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:49,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 15:42:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 15:42:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-11 15:42:49,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:49,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-10-11 15:42:49,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746558278] [2020-10-11 15:42:49,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 15:42:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 15:42:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 15:42:49,217 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 19 states. [2020-10-11 15:42:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:51,034 INFO L93 Difference]: Finished difference Result 650 states and 876 transitions. [2020-10-11 15:42:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-11 15:42:51,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-11 15:42:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:51,039 INFO L225 Difference]: With dead ends: 650 [2020-10-11 15:42:51,039 INFO L226 Difference]: Without dead ends: 650 [2020-10-11 15:42:51,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2184, Invalid=4956, Unknown=0, NotChecked=0, Total=7140 [2020-10-11 15:42:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-11 15:42:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 595. [2020-10-11 15:42:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-11 15:42:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 811 transitions. [2020-10-11 15:42:51,060 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 811 transitions. Word has length 63 [2020-10-11 15:42:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:51,061 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 811 transitions. [2020-10-11 15:42:51,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 15:42:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 811 transitions. [2020-10-11 15:42:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-11 15:42:51,064 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:51,064 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:51,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 15:42:51,278 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1647338205, now seen corresponding path program 13 times [2020-10-11 15:42:51,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:51,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958445552] [2020-10-11 15:42:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-11 15:42:51,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958445552] [2020-10-11 15:42:51,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804220448] [2020-10-11 15:42:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:51,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 15:42:51,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-11 15:42:51,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:51,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 15:42:51,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125584897] [2020-10-11 15:42:51,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 15:42:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 15:42:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 15:42:51,584 INFO L87 Difference]: Start difference. First operand 595 states and 811 transitions. Second operand 15 states. [2020-10-11 15:42:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:51,644 INFO L93 Difference]: Finished difference Result 670 states and 907 transitions. [2020-10-11 15:42:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 15:42:51,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-11 15:42:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:51,648 INFO L225 Difference]: With dead ends: 670 [2020-10-11 15:42:51,648 INFO L226 Difference]: Without dead ends: 670 [2020-10-11 15:42:51,650 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 15:42:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-11 15:42:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 643. [2020-10-11 15:42:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-11 15:42:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-10-11 15:42:51,665 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 70 [2020-10-11 15:42:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:51,665 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-10-11 15:42:51,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 15:42:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-10-11 15:42:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-11 15:42:51,667 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:51,667 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:51,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 15:42:51,881 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 14 times [2020-10-11 15:42:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:51,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935676843] [2020-10-11 15:42:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-11 15:42:52,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935676843] [2020-10-11 15:42:52,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523285736] [2020-10-11 15:42:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:52,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:42:52,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 15:42:52,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-11 15:42:52,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:52,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 15:42:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027437419] [2020-10-11 15:42:52,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 15:42:52,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 15:42:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 15:42:52,143 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-10-11 15:42:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:52,206 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-10-11 15:42:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 15:42:52,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-11 15:42:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:52,210 INFO L225 Difference]: With dead ends: 718 [2020-10-11 15:42:52,210 INFO L226 Difference]: Without dead ends: 718 [2020-10-11 15:42:52,210 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 15:42:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-11 15:42:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-10-11 15:42:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-11 15:42:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-10-11 15:42:52,225 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-10-11 15:42:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:52,225 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-10-11 15:42:52,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 15:42:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-10-11 15:42:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-11 15:42:52,233 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:52,233 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:52,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:52,449 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 15 times [2020-10-11 15:42:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:52,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829942674] [2020-10-11 15:42:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-11 15:42:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829942674] [2020-10-11 15:42:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764256640] [2020-10-11 15:42:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:52,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 15:42:52,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 15:42:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-11 15:42:52,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:52,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-10-11 15:42:52,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984162726] [2020-10-11 15:42:52,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 15:42:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 15:42:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-11 15:42:52,887 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 23 states. [2020-10-11 15:42:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:56,313 INFO L93 Difference]: Finished difference Result 896 states and 1188 transitions. [2020-10-11 15:42:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-11 15:42:56,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2020-10-11 15:42:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:56,318 INFO L225 Difference]: With dead ends: 896 [2020-10-11 15:42:56,318 INFO L226 Difference]: Without dead ends: 896 [2020-10-11 15:42:56,323 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4844 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4320, Invalid=10200, Unknown=0, NotChecked=0, Total=14520 [2020-10-11 15:42:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-10-11 15:42:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 832. [2020-10-11 15:42:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-10-11 15:42:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1114 transitions. [2020-10-11 15:42:56,343 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1114 transitions. Word has length 78 [2020-10-11 15:42:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:56,344 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1114 transitions. [2020-10-11 15:42:56,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 15:42:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1114 transitions. [2020-10-11 15:42:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-11 15:42:56,346 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:56,346 INFO L421 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:56,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 15:42:56,560 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1559138385, now seen corresponding path program 16 times [2020-10-11 15:42:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:56,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478839723] [2020-10-11 15:42:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-11 15:42:56,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478839723] [2020-10-11 15:42:56,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126499885] [2020-10-11 15:42:56,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:42:56,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:42:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 15:42:56,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-11 15:42:57,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:57,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 15:42:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328210742] [2020-10-11 15:42:57,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 15:42:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 15:42:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 15:42:57,049 INFO L87 Difference]: Start difference. First operand 832 states and 1114 transitions. Second operand 18 states. [2020-10-11 15:42:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:57,123 INFO L93 Difference]: Finished difference Result 916 states and 1220 transitions. [2020-10-11 15:42:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 15:42:57,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-11 15:42:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:57,127 INFO L225 Difference]: With dead ends: 916 [2020-10-11 15:42:57,128 INFO L226 Difference]: Without dead ends: 916 [2020-10-11 15:42:57,128 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 15:42:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-11 15:42:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2020-10-11 15:42:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-10-11 15:42:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-10-11 15:42:57,165 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 85 [2020-10-11 15:42:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:57,165 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-10-11 15:42:57,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 15:42:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-10-11 15:42:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-11 15:42:57,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:57,168 INFO L421 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:57,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 15:42:57,382 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:57,382 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 17 times [2020-10-11 15:42:57,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:57,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818915802] [2020-10-11 15:42:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-11 15:42:57,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818915802] [2020-10-11 15:42:57,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436025024] [2020-10-11 15:42:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:57,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-11 15:42:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 15:42:57,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-11 15:42:57,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:57,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 15:42:57,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926941645] [2020-10-11 15:42:57,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 15:42:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 15:42:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 15:42:57,759 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-10-11 15:42:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:42:57,834 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-10-11 15:42:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 15:42:57,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-11 15:42:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:42:57,838 INFO L225 Difference]: With dead ends: 970 [2020-10-11 15:42:57,838 INFO L226 Difference]: Without dead ends: 970 [2020-10-11 15:42:57,839 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 15:42:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-11 15:42:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-10-11 15:42:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-11 15:42:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-10-11 15:42:57,854 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-10-11 15:42:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:42:57,854 INFO L481 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-10-11 15:42:57,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 15:42:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-10-11 15:42:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-11 15:42:57,857 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:42:57,857 INFO L421 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:42:58,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:58,072 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:42:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:42:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 18 times [2020-10-11 15:42:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:42:58,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896805797] [2020-10-11 15:42:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:42:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:42:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-11 15:42:58,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896805797] [2020-10-11 15:42:58,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070372883] [2020-10-11 15:42:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:42:58,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-11 15:42:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:42:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 15:42:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:42:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-11 15:42:58,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:42:58,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-10-11 15:42:58,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951013290] [2020-10-11 15:42:58,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 15:42:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:42:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 15:42:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-11 15:42:58,865 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 27 states. [2020-10-11 15:43:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:04,657 INFO L93 Difference]: Finished difference Result 1178 states and 1542 transitions. [2020-10-11 15:43:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-11 15:43:04,658 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2020-10-11 15:43:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:04,661 INFO L225 Difference]: With dead ends: 1178 [2020-10-11 15:43:04,662 INFO L226 Difference]: Without dead ends: 1178 [2020-10-11 15:43:04,667 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9308 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7695, Invalid=18711, Unknown=0, NotChecked=0, Total=26406 [2020-10-11 15:43:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-11 15:43:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1105. [2020-10-11 15:43:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2020-10-11 15:43:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1459 transitions. [2020-10-11 15:43:04,687 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1459 transitions. Word has length 93 [2020-10-11 15:43:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:04,687 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states and 1459 transitions. [2020-10-11 15:43:04,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 15:43:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1459 transitions. [2020-10-11 15:43:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-11 15:43:04,690 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:04,691 INFO L421 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:04,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:04,904 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2077738871, now seen corresponding path program 19 times [2020-10-11 15:43:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:04,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549327360] [2020-10-11 15:43:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-11 15:43:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549327360] [2020-10-11 15:43:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636383019] [2020-10-11 15:43:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 15:43:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-11 15:43:05,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:05,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 15:43:05,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348257885] [2020-10-11 15:43:05,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 15:43:05,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 15:43:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 15:43:05,295 INFO L87 Difference]: Start difference. First operand 1105 states and 1459 transitions. Second operand 21 states. [2020-10-11 15:43:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:05,392 INFO L93 Difference]: Finished difference Result 1198 states and 1575 transitions. [2020-10-11 15:43:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 15:43:05,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-11 15:43:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:05,397 INFO L225 Difference]: With dead ends: 1198 [2020-10-11 15:43:05,397 INFO L226 Difference]: Without dead ends: 1198 [2020-10-11 15:43:05,397 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 15:43:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2020-10-11 15:43:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1165. [2020-10-11 15:43:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-10-11 15:43:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-10-11 15:43:05,414 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 100 [2020-10-11 15:43:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:05,415 INFO L481 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-10-11 15:43:05,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 15:43:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-10-11 15:43:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-11 15:43:05,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:05,418 INFO L421 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:05,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:05,633 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 20 times [2020-10-11 15:43:05,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:05,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481887705] [2020-10-11 15:43:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-11 15:43:05,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481887705] [2020-10-11 15:43:05,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373767569] [2020-10-11 15:43:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:43:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 15:43:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-11 15:43:06,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:06,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 15:43:06,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037323966] [2020-10-11 15:43:06,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 15:43:06,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 15:43:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 15:43:06,054 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-10-11 15:43:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:06,148 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-10-11 15:43:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 15:43:06,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-10-11 15:43:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:06,152 INFO L225 Difference]: With dead ends: 1258 [2020-10-11 15:43:06,153 INFO L226 Difference]: Without dead ends: 1258 [2020-10-11 15:43:06,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 15:43:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-10-11 15:43:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-10-11 15:43:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-11 15:43:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-10-11 15:43:06,171 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-10-11 15:43:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:06,171 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-10-11 15:43:06,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 15:43:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-10-11 15:43:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-11 15:43:06,175 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:06,175 INFO L421 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:06,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 15:43:06,389 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 21 times [2020-10-11 15:43:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:06,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358849138] [2020-10-11 15:43:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-11 15:43:06,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358849138] [2020-10-11 15:43:06,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50460709] [2020-10-11 15:43:06,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:07,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 15:43:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:07,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 15:43:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-11 15:43:07,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:07,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2020-10-11 15:43:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73051823] [2020-10-11 15:43:07,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 15:43:07,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:07,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 15:43:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-11 15:43:07,400 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 31 states. [2020-10-11 15:43:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:16,616 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-10-11 15:43:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-10-11 15:43:16,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 108 [2020-10-11 15:43:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:16,621 INFO L225 Difference]: With dead ends: 1460 [2020-10-11 15:43:16,622 INFO L226 Difference]: Without dead ends: 1460 [2020-10-11 15:43:16,625 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16281 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12705, Invalid=31605, Unknown=0, NotChecked=0, Total=44310 [2020-10-11 15:43:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-11 15:43:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-10-11 15:43:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-10-11 15:43:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-10-11 15:43:16,646 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 108 [2020-10-11 15:43:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:16,646 INFO L481 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-10-11 15:43:16,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 15:43:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-10-11 15:43:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-11 15:43:16,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:16,650 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:16,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 15:43:16,865 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-10-11 15:43:16,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:16,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473693340] [2020-10-11 15:43:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:17,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473693340] [2020-10-11 15:43:17,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980138713] [2020-10-11 15:43:17,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:43:17,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:43:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 15:43:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:17,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:17,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 15:43:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217807969] [2020-10-11 15:43:17,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 15:43:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 15:43:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 15:43:17,697 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-10-11 15:43:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:17,782 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-10-11 15:43:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 15:43:17,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-11 15:43:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:17,789 INFO L225 Difference]: With dead ends: 1589 [2020-10-11 15:43:17,789 INFO L226 Difference]: Without dead ends: 1589 [2020-10-11 15:43:17,789 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 15:43:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-11 15:43:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-10-11 15:43:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-11 15:43:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-10-11 15:43:17,812 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-10-11 15:43:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:17,812 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-10-11 15:43:17,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 15:43:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-10-11 15:43:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-11 15:43:17,816 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:17,817 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:18,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:18,030 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-10-11 15:43:18,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:18,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109027542] [2020-10-11 15:43:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109027542] [2020-10-11 15:43:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675406110] [2020-10-11 15:43:18,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:18,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-11 15:43:18,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 15:43:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:18,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:18,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 15:43:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374925733] [2020-10-11 15:43:18,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 15:43:18,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 15:43:18,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-11 15:43:18,715 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-10-11 15:43:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:18,820 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-10-11 15:43:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 15:43:18,821 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-10-11 15:43:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:18,830 INFO L225 Difference]: With dead ends: 1718 [2020-10-11 15:43:18,830 INFO L226 Difference]: Without dead ends: 1718 [2020-10-11 15:43:18,830 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-11 15:43:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-11 15:43:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-10-11 15:43:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-10-11 15:43:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-10-11 15:43:18,876 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-10-11 15:43:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:18,876 INFO L481 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-10-11 15:43:18,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 15:43:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-10-11 15:43:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-11 15:43:18,883 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:18,883 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 15:43:19,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-10-11 15:43:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:19,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968375567] [2020-10-11 15:43:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:19,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968375567] [2020-10-11 15:43:19,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206936093] [2020-10-11 15:43:19,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:19,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-10-11 15:43:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 15:43:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:19,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:19,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 15:43:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470746676] [2020-10-11 15:43:19,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 15:43:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 15:43:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 15:43:19,764 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-10-11 15:43:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:19,858 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-10-11 15:43:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 15:43:19,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-11 15:43:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:19,864 INFO L225 Difference]: With dead ends: 1847 [2020-10-11 15:43:19,865 INFO L226 Difference]: Without dead ends: 1847 [2020-10-11 15:43:19,865 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 15:43:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-10-11 15:43:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-10-11 15:43:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-11 15:43:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-10-11 15:43:19,888 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-10-11 15:43:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:19,889 INFO L481 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-10-11 15:43:19,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 15:43:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-10-11 15:43:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-11 15:43:19,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:19,893 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:20,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:20,106 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-10-11 15:43:20,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:20,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444388969] [2020-10-11 15:43:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:20,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444388969] [2020-10-11 15:43:20,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624778277] [2020-10-11 15:43:20,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 15:43:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:20,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:20,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 15:43:20,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884757307] [2020-10-11 15:43:20,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 15:43:20,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 15:43:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 15:43:20,477 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-10-11 15:43:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:20,599 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-10-11 15:43:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 15:43:20,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-10-11 15:43:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:20,607 INFO L225 Difference]: With dead ends: 1976 [2020-10-11 15:43:20,607 INFO L226 Difference]: Without dead ends: 1976 [2020-10-11 15:43:20,608 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 15:43:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-11 15:43:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-10-11 15:43:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-11 15:43:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-10-11 15:43:20,636 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-10-11 15:43:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:20,637 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-10-11 15:43:20,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 15:43:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-10-11 15:43:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-11 15:43:20,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:20,641 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:20,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 15:43:20,856 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:20,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-10-11 15:43:20,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:20,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520569850] [2020-10-11 15:43:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:21,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520569850] [2020-10-11 15:43:21,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045519074] [2020-10-11 15:43:21,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:43:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 15:43:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:21,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:21,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 15:43:21,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877496273] [2020-10-11 15:43:21,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 15:43:21,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 15:43:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-11 15:43:21,212 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-10-11 15:43:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:21,287 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-10-11 15:43:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 15:43:21,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-11 15:43:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:21,300 INFO L225 Difference]: With dead ends: 2105 [2020-10-11 15:43:21,300 INFO L226 Difference]: Without dead ends: 2105 [2020-10-11 15:43:21,301 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-11 15:43:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-11 15:43:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-10-11 15:43:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-10-11 15:43:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-10-11 15:43:21,322 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-10-11 15:43:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:21,322 INFO L481 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-10-11 15:43:21,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 15:43:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-10-11 15:43:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-11 15:43:21,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:21,327 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:21,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 15:43:21,542 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:21,542 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-10-11 15:43:21,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:21,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101103291] [2020-10-11 15:43:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101103291] [2020-10-11 15:43:21,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772076699] [2020-10-11 15:43:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:22,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-11 15:43:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 15:43:22,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:22,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:22,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 15:43:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237728502] [2020-10-11 15:43:22,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 15:43:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 15:43:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 15:43:22,105 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-10-11 15:43:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:22,200 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-10-11 15:43:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 15:43:22,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-10-11 15:43:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:22,213 INFO L225 Difference]: With dead ends: 2234 [2020-10-11 15:43:22,213 INFO L226 Difference]: Without dead ends: 2234 [2020-10-11 15:43:22,216 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 15:43:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-10-11 15:43:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-10-11 15:43:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-10-11 15:43:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-10-11 15:43:22,254 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-10-11 15:43:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:22,255 INFO L481 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-10-11 15:43:22,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 15:43:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-10-11 15:43:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-11 15:43:22,262 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:22,262 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:22,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 15:43:22,477 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-10-11 15:43:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:22,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850903673] [2020-10-11 15:43:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:22,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850903673] [2020-10-11 15:43:22,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360455338] [2020-10-11 15:43:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:43:23,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:43:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:23,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 15:43:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:23,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:23,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 15:43:23,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219472913] [2020-10-11 15:43:23,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 15:43:23,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 15:43:23,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 15:43:23,908 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-10-11 15:43:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:23,996 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-10-11 15:43:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 15:43:23,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-10-11 15:43:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:24,004 INFO L225 Difference]: With dead ends: 2363 [2020-10-11 15:43:24,005 INFO L226 Difference]: Without dead ends: 2363 [2020-10-11 15:43:24,005 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 15:43:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-11 15:43:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-10-11 15:43:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-10-11 15:43:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-10-11 15:43:24,026 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-10-11 15:43:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:24,026 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-10-11 15:43:24,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 15:43:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-10-11 15:43:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-11 15:43:24,029 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:24,029 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:24,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:24,230 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-10-11 15:43:24,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:24,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469592674] [2020-10-11 15:43:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469592674] [2020-10-11 15:43:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660717661] [2020-10-11 15:43:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:24,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-11 15:43:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:24,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 15:43:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:24,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:24,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 15:43:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416180216] [2020-10-11 15:43:24,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 15:43:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 15:43:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-11 15:43:24,972 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-10-11 15:43:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:25,075 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-10-11 15:43:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 15:43:25,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-10-11 15:43:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:25,081 INFO L225 Difference]: With dead ends: 2492 [2020-10-11 15:43:25,081 INFO L226 Difference]: Without dead ends: 2492 [2020-10-11 15:43:25,082 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-11 15:43:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-10-11 15:43:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-10-11 15:43:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-10-11 15:43:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-10-11 15:43:25,113 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-10-11 15:43:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:25,113 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-10-11 15:43:25,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 15:43:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-10-11 15:43:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-11 15:43:25,117 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:25,118 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:25,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 15:43:25,330 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-10-11 15:43:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:25,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206657261] [2020-10-11 15:43:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:25,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206657261] [2020-10-11 15:43:25,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670222715] [2020-10-11 15:43:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:26,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-11 15:43:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 15:43:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:26,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 15:43:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102940791] [2020-10-11 15:43:26,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 15:43:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 15:43:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 15:43:26,270 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-10-11 15:43:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:26,369 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-10-11 15:43:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 15:43:26,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-10-11 15:43:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:26,378 INFO L225 Difference]: With dead ends: 2621 [2020-10-11 15:43:26,378 INFO L226 Difference]: Without dead ends: 2621 [2020-10-11 15:43:26,378 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 15:43:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-10-11 15:43:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-10-11 15:43:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-10-11 15:43:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-10-11 15:43:26,411 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-10-11 15:43:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:26,412 INFO L481 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-10-11 15:43:26,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 15:43:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-10-11 15:43:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-11 15:43:26,416 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:26,416 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:26,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:26,617 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-10-11 15:43:26,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:26,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884993996] [2020-10-11 15:43:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:26,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884993996] [2020-10-11 15:43:26,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271310940] [2020-10-11 15:43:26,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:27,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 15:43:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:27,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:27,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 15:43:27,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303975131] [2020-10-11 15:43:27,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 15:43:27,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 15:43:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 15:43:27,084 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-10-11 15:43:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:27,210 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-10-11 15:43:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 15:43:27,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-10-11 15:43:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:27,218 INFO L225 Difference]: With dead ends: 2750 [2020-10-11 15:43:27,219 INFO L226 Difference]: Without dead ends: 2750 [2020-10-11 15:43:27,221 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 15:43:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-11 15:43:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-10-11 15:43:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-11 15:43:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-10-11 15:43:27,245 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-10-11 15:43:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:27,246 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-10-11 15:43:27,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 15:43:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-10-11 15:43:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-11 15:43:27,249 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:27,249 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:27,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 15:43:27,450 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-10-11 15:43:27,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:27,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558410685] [2020-10-11 15:43:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558410685] [2020-10-11 15:43:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478528377] [2020-10-11 15:43:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:27,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:43:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 15:43:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-11 15:43:27,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:27,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 15:43:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127874670] [2020-10-11 15:43:27,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 15:43:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 15:43:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-11 15:43:27,985 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-10-11 15:43:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:43:28,121 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-10-11 15:43:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 15:43:28,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-10-11 15:43:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:43:28,127 INFO L225 Difference]: With dead ends: 2833 [2020-10-11 15:43:28,127 INFO L226 Difference]: Without dead ends: 2833 [2020-10-11 15:43:28,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-11 15:43:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-10-11 15:43:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-10-11 15:43:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-11 15:43:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-10-11 15:43:28,161 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-10-11 15:43:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:43:28,161 INFO L481 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-10-11 15:43:28,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 15:43:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-10-11 15:43:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:43:28,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:43:28,167 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:43:28,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 15:43:28,380 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:43:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:43:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-10-11 15:43:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:43:28,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900422713] [2020-10-11 15:43:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:43:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:43:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:43:31,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900422713] [2020-10-11 15:43:31,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975109713] [2020-10-11 15:43:31,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:43:32,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-11 15:43:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:43:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:43:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:43:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:43:32,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:43:32,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:43:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212156527] [2020-10-11 15:43:32,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:43:32,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:43:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:43:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:43:32,567 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-10-11 15:44:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:44:55,882 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-10-11 15:44:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-10-11 15:44:55,883 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:44:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:44:55,942 INFO L225 Difference]: With dead ends: 32926 [2020-10-11 15:44:55,943 INFO L226 Difference]: Without dead ends: 32924 [2020-10-11 15:44:56,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-10-11 15:44:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-10-11 15:44:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-10-11 15:44:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-11 15:44:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-10-11 15:44:56,246 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-10-11 15:44:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:44:56,247 INFO L481 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-10-11 15:44:56,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:44:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-10-11 15:44:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:44:56,253 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:44:56,253 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:44:56,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 15:44:56,468 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:44:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:44:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-10-11 15:44:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:44:56,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008813199] [2020-10-11 15:44:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:44:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:44:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:44:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008813199] [2020-10-11 15:44:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000443525] [2020-10-11 15:44:59,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:45:01,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:45:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:45:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:45:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:45:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:45:01,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:45:01,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:45:01,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487618913] [2020-10-11 15:45:01,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:45:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:45:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:45:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:45:01,988 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-10-11 15:46:04,926 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-11 15:46:12,845 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-11 15:46:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:46:23,040 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-10-11 15:46:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:46:23,041 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:46:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:46:23,083 INFO L225 Difference]: With dead ends: 30945 [2020-10-11 15:46:23,084 INFO L226 Difference]: Without dead ends: 30943 [2020-10-11 15:46:23,095 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:46:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-10-11 15:46:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-10-11 15:46:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-11 15:46:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-10-11 15:46:23,250 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-10-11 15:46:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:46:23,253 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-10-11 15:46:23,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:46:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-10-11 15:46:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:46:23,258 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:46:23,259 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:46:23,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 15:46:23,474 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:46:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:46:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-10-11 15:46:23,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:46:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866053216] [2020-10-11 15:46:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:46:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:46:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:46:26,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866053216] [2020-10-11 15:46:26,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342904188] [2020-10-11 15:46:26,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:46:27,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-11 15:46:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:46:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:46:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:46:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:46:27,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:46:27,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:46:27,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214184369] [2020-10-11 15:46:27,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:46:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:46:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:46:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:46:27,221 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-10-11 15:47:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:47:50,418 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-10-11 15:47:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:47:50,419 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:47:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:47:50,444 INFO L225 Difference]: With dead ends: 30939 [2020-10-11 15:47:50,444 INFO L226 Difference]: Without dead ends: 30937 [2020-10-11 15:47:50,451 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:47:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-10-11 15:47:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-10-11 15:47:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-10-11 15:47:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-10-11 15:47:50,608 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-10-11 15:47:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:47:50,609 INFO L481 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-10-11 15:47:50,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:47:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-10-11 15:47:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:47:50,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:47:50,615 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:47:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 15:47:50,830 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:47:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:47:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-10-11 15:47:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:47:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303741392] [2020-10-11 15:47:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:47:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:47:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:47:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303741392] [2020-10-11 15:47:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075351274] [2020-10-11 15:47:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:47:55,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-11 15:47:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:47:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:47:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:47:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:47:55,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:47:55,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:47:55,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967074243] [2020-10-11 15:47:55,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:47:55,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:47:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:47:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:47:55,199 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-10-11 15:49:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:49:23,722 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-10-11 15:49:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:49:23,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:49:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:49:23,757 INFO L225 Difference]: With dead ends: 30933 [2020-10-11 15:49:23,758 INFO L226 Difference]: Without dead ends: 30931 [2020-10-11 15:49:23,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:49:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-10-11 15:49:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-10-11 15:49:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-11 15:49:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-10-11 15:49:24,058 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-10-11 15:49:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:49:24,058 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-10-11 15:49:24,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:49:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-10-11 15:49:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:49:24,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:49:24,064 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:49:24,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 15:49:24,280 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:49:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:49:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-10-11 15:49:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:49:24,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490209613] [2020-10-11 15:49:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:49:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:49:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:49:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490209613] [2020-10-11 15:49:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045429509] [2020-10-11 15:49:28,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:49:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:49:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:49:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:49:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:49:28,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:49:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:49:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972879793] [2020-10-11 15:49:28,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:49:28,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:49:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:49:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:49:28,554 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-10-11 15:51:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:51:00,370 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-10-11 15:51:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:51:00,371 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:51:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:51:00,399 INFO L225 Difference]: With dead ends: 30927 [2020-10-11 15:51:00,399 INFO L226 Difference]: Without dead ends: 30925 [2020-10-11 15:51:00,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:51:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-10-11 15:51:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-10-11 15:51:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-10-11 15:51:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-10-11 15:51:00,572 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-10-11 15:51:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:51:00,572 INFO L481 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-10-11 15:51:00,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:51:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-10-11 15:51:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:51:00,577 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:51:00,578 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:51:00,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 15:51:00,792 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:51:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:51:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-10-11 15:51:00,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:51:00,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467918745] [2020-10-11 15:51:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:51:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:51:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:51:05,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467918745] [2020-10-11 15:51:05,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513402485] [2020-10-11 15:51:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:51:05,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 15:51:05,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:51:05,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:51:05,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:51:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:51:05,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:51:05,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:51:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667248192] [2020-10-11 15:51:05,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:51:05,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:51:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:51:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:51:05,333 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states. [2020-10-11 15:52:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:52:42,251 INFO L93 Difference]: Finished difference Result 30921 states and 43137 transitions. [2020-10-11 15:52:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:52:42,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:52:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:52:42,274 INFO L225 Difference]: With dead ends: 30921 [2020-10-11 15:52:42,275 INFO L226 Difference]: Without dead ends: 30919 [2020-10-11 15:52:42,283 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:52:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2020-10-11 15:52:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 2997. [2020-10-11 15:52:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-10-11 15:52:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3829 transitions. [2020-10-11 15:52:42,387 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3829 transitions. Word has length 148 [2020-10-11 15:52:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:52:42,387 INFO L481 AbstractCegarLoop]: Abstraction has 2997 states and 3829 transitions. [2020-10-11 15:52:42,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:52:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3829 transitions. [2020-10-11 15:52:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:52:42,391 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:52:42,391 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:52:42,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 15:52:42,592 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:52:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:52:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1924796351, now seen corresponding path program 39 times [2020-10-11 15:52:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:52:42,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323616843] [2020-10-11 15:52:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:52:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:52:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:52:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323616843] [2020-10-11 15:52:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40060185] [2020-10-11 15:52:46,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:52:47,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-11 15:52:47,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:52:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:52:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:52:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:52:48,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:52:48,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:52:48,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139816267] [2020-10-11 15:52:48,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:52:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:52:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:52:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:52:48,012 INFO L87 Difference]: Start difference. First operand 2997 states and 3829 transitions. Second operand 63 states. [2020-10-11 15:54:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 15:54:37,066 INFO L93 Difference]: Finished difference Result 30915 states and 43128 transitions. [2020-10-11 15:54:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-11 15:54:37,068 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-11 15:54:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 15:54:37,091 INFO L225 Difference]: With dead ends: 30915 [2020-10-11 15:54:37,091 INFO L226 Difference]: Without dead ends: 30913 [2020-10-11 15:54:37,101 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-11 15:54:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30913 states. [2020-10-11 15:54:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30913 to 3003. [2020-10-11 15:54:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-10-11 15:54:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 3836 transitions. [2020-10-11 15:54:37,205 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 3836 transitions. Word has length 148 [2020-10-11 15:54:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 15:54:37,205 INFO L481 AbstractCegarLoop]: Abstraction has 3003 states and 3836 transitions. [2020-10-11 15:54:37,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 15:54:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 3836 transitions. [2020-10-11 15:54:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-11 15:54:37,209 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 15:54:37,209 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 15:54:37,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:54:37,410 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 15:54:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 15:54:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -791735251, now seen corresponding path program 40 times [2020-10-11 15:54:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 15:54:37,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580822873] [2020-10-11 15:54:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 15:54:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 15:54:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:54:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580822873] [2020-10-11 15:54:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918622063] [2020-10-11 15:54:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 15:54:45,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 15:54:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 15:54:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-11 15:54:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 15:54:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 15:54:45,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 15:54:45,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-11 15:54:45,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538796571] [2020-10-11 15:54:45,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 15:54:45,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 15:54:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 15:54:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 15:54:45,302 INFO L87 Difference]: Start difference. First operand 3003 states and 3836 transitions. Second operand 63 states. Received shutdown request... [2020-10-11 15:55:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2020-10-11 15:55:38,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 15:55:38,786 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 15:55:38,790 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 15:55:38,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 03:55:38 BasicIcfg [2020-10-11 15:55:38,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 15:55:38,792 INFO L168 Benchmark]: Toolchain (without parser) took 782101.17 ms. Allocated memory was 253.2 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 209.8 MB in the beginning and 891.5 MB in the end (delta: -681.6 MB). Peak memory consumption was 797.4 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,792 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 15:55:38,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1052.50 ms. Allocated memory was 253.2 MB in the beginning and 319.3 MB in the end (delta: 66.1 MB). Free memory was 207.3 MB in the beginning and 221.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 62.5 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.26 ms. Allocated memory is still 319.3 MB. Free memory was 221.4 MB in the beginning and 218.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,793 INFO L168 Benchmark]: Boogie Preprocessor took 29.10 ms. Allocated memory is still 319.3 MB. Free memory was 218.9 MB in the beginning and 216.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,793 INFO L168 Benchmark]: RCFGBuilder took 495.23 ms. Allocated memory is still 319.3 MB. Free memory was 216.4 MB in the beginning and 189.3 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,794 INFO L168 Benchmark]: TraceAbstraction took 780433.96 ms. Allocated memory was 319.3 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 189.3 MB in the beginning and 891.5 MB in the end (delta: -702.1 MB). Peak memory consumption was 710.8 MB. Max. memory is 14.2 GB. [2020-10-11 15:55:38,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1052.50 ms. Allocated memory was 253.2 MB in the beginning and 319.3 MB in the end (delta: 66.1 MB). Free memory was 207.3 MB in the beginning and 221.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 62.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 83.26 ms. Allocated memory is still 319.3 MB. Free memory was 221.4 MB in the beginning and 218.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.10 ms. Allocated memory is still 319.3 MB. Free memory was 218.9 MB in the beginning and 216.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 495.23 ms. Allocated memory is still 319.3 MB. Free memory was 216.4 MB in the beginning and 189.3 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 780433.96 ms. Allocated memory was 319.3 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 189.3 MB in the beginning and 891.5 MB in the end (delta: -702.1 MB). Peak memory consumption was 710.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 424 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 36 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.0s, 78 PlacesBefore, 19 PlacesAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 5 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 75 TotalNumberOfCompositions, 823 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (3003states) and FLOYD_HOARE automaton (currently 256 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 293 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 780.3s, OverallIterations: 42, TraceHistogramMax: 20, AutomataDifference: 711.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 17194 SDtfs, 25664 SDslu, 968144 SDs, 0 SdLazy, 557347 SolverSat, 6040 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 257.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9956 GetRequests, 4353 SyntacticMatches, 16 SemanticMatches, 5586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132392 ImplicationChecksByTransitivity, 315.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3003occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 41 MinimizatonAttempts, 198749 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 12.2s SatisfiabilityAnalysisTime, 39.5s InterpolantComputationTime, 7745 NumberOfCodeBlocks, 7514 NumberOfCodeBlocksAsserted, 373 NumberOfCheckSat, 7663 ConstructedInterpolants, 0 QuantifiedInterpolants, 3908851 SizeOfPredicates, 353 NumberOfNonLiveVariables, 14635 ConjunctsInSsa, 1678 ConjunctsInUnsatCore, 82 InterpolantComputations, 3 PerfectInterpolantSequences, 20421/56945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown