/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 09:11:44,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 09:11:44,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 09:11:44,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 09:11:44,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 09:11:44,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 09:11:44,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 09:11:44,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 09:11:44,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 09:11:44,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 09:11:44,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 09:11:44,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 09:11:44,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 09:11:44,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 09:11:44,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 09:11:44,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 09:11:44,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 09:11:44,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 09:11:44,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 09:11:44,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 09:11:44,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 09:11:44,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 09:11:44,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 09:11:44,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 09:11:44,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 09:11:44,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 09:11:44,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 09:11:44,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 09:11:44,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 09:11:44,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 09:11:44,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 09:11:44,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 09:11:44,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 09:11:44,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 09:11:44,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 09:11:44,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 09:11:44,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 09:11:44,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 09:11:44,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 09:11:44,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 09:11:44,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 09:11:44,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 09:11:44,486 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 09:11:44,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 09:11:44,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 09:11:44,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 09:11:44,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 09:11:44,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 09:11:44,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 09:11:44,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 09:11:44,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:11:44,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 09:11:44,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 09:11:44,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 09:11:44,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 09:11:44,491 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 09:11:44,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 09:11:44,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 09:11:44,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 09:11:44,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 09:11:44,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 09:11:44,709 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 09:11:44,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-01-19 09:11:44,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e495feef9/33fb9132b00b480fa086167077b38a13/FLAGc729222fc [2022-01-19 09:11:45,151 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 09:11:45,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-01-19 09:11:45,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e495feef9/33fb9132b00b480fa086167077b38a13/FLAGc729222fc [2022-01-19 09:11:45,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e495feef9/33fb9132b00b480fa086167077b38a13 [2022-01-19 09:11:45,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 09:11:45,169 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 09:11:45,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 09:11:45,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 09:11:45,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 09:11:45,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cac106a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45, skipping insertion in model container [2022-01-19 09:11:45,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 09:11:45,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 09:11:45,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1876,1889] [2022-01-19 09:11:45,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:11:45,342 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 09:11:45,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1876,1889] [2022-01-19 09:11:45,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:11:45,365 INFO L208 MainTranslator]: Completed translation [2022-01-19 09:11:45,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45 WrapperNode [2022-01-19 09:11:45,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 09:11:45,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 09:11:45,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 09:11:45,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 09:11:45,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,389 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-01-19 09:11:45,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 09:11:45,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 09:11:45,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 09:11:45,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 09:11:45,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 09:11:45,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 09:11:45,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 09:11:45,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 09:11:45,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (1/1) ... [2022-01-19 09:11:45,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:11:45,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:45,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 09:11:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 09:11:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 09:11:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 09:11:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 09:11:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 09:11:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 09:11:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 09:11:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 09:11:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 09:11:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 09:11:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 09:11:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 09:11:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 09:11:45,482 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 09:11:45,560 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 09:11:45,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 09:11:45,712 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 09:11:45,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 09:11:45,717 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 09:11:45,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:11:45 BoogieIcfgContainer [2022-01-19 09:11:45,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 09:11:45,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 09:11:45,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 09:11:45,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 09:11:45,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 09:11:45" (1/3) ... [2022-01-19 09:11:45,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cee5044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:11:45, skipping insertion in model container [2022-01-19 09:11:45,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:11:45" (2/3) ... [2022-01-19 09:11:45,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cee5044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:11:45, skipping insertion in model container [2022-01-19 09:11:45,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:11:45" (3/3) ... [2022-01-19 09:11:45,732 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-01-19 09:11:45,741 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 09:11:45,741 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 09:11:45,741 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 09:11:45,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,771 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,771 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,773 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,776 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,777 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:11:45,780 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 09:11:45,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:11:45,826 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:11:45,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 09:11:45,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 09:11:45,868 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-01-19 09:11:45,868 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:11:45,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-01-19 09:11:45,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 09:11:45,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-01-19 09:11:45,892 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-01-19 09:11:45,892 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:11:45,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:45,893 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:45,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:45,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1675015954, now seen corresponding path program 1 times [2022-01-19 09:11:45,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:45,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551082564] [2022-01-19 09:11:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:45,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:46,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:46,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551082564] [2022-01-19 09:11:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551082564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:11:46,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:11:46,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:11:46,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614453199] [2022-01-19 09:11:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:46,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:11:46,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:11:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:11:46,119 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-01-19 09:11:46,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:46,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-01-19 09:11:46,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:46,177 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-01-19 09:11:46,177 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 09:11:46,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-01-19 09:11:46,179 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-01-19 09:11:46,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-01-19 09:11:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:11:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:11:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-01-19 09:11:46,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-01-19 09:11:46,193 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-01-19 09:11:46,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-01-19 09:11:46,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:46,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-01-19 09:11:46,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,213 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,214 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-01-19 09:11:46,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-01-19 09:11:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 09:11:46,225 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-01-19 09:11:46,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-01-19 09:11:46,230 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-01-19 09:11:46,231 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-01-19 09:11:46,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:46,232 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 09:11:46,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2022-01-19 09:11:46,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111428026] [2022-01-19 09:11:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:46,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:46,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111428026] [2022-01-19 09:11:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111428026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:11:46,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:11:46,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 09:11:46,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338118325] [2022-01-19 09:11:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:46,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 09:11:46,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 09:11:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-19 09:11:46,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 09:11:46,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:46,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 09:11:46,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:46,641 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2022-01-19 09:11:46,641 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-01-19 09:11:46,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2022-01-19 09:11:46,643 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-01-19 09:11:46,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-01-19 09:11:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 09:11:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 09:11:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-01-19 09:11:46,649 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-01-19 09:11:46,649 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-01-19 09:11:46,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-01-19 09:11:46,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:46,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-01-19 09:11:46,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,655 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,655 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-01-19 09:11:46,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-01-19 09:11:46,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:11:46,659 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-01-19 09:11:46,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-01-19 09:11:46,660 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-01-19 09:11:46,660 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-01-19 09:11:46,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:46,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:46,661 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:46,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 09:11:46,661 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2022-01-19 09:11:46,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982749000] [2022-01-19 09:11:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:46,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:46,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982749000] [2022-01-19 09:11:46,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982749000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865330704] [2022-01-19 09:11:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:46,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:46,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:46,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 09:11:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 09:11:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:47,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:47,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865330704] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:47,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 09:11:47,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-01-19 09:11:47,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267055405] [2022-01-19 09:11:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:47,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 09:11:47,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 09:11:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-19 09:11:47,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 09:11:47,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:47,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 09:11:47,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:47,510 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2022-01-19 09:11:47,510 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-01-19 09:11:47,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 977 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2022-01-19 09:11:47,514 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-01-19 09:11:47,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-01-19 09:11:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 09:11:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 09:11:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-01-19 09:11:47,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-01-19 09:11:47,517 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-01-19 09:11:47,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-01-19 09:11:47,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:47,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-01-19 09:11:47,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,520 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,520 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-01-19 09:11:47,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-01-19 09:11:47,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-01-19 09:11:47,524 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-01-19 09:11:47,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-01-19 09:11:47,526 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-01-19 09:11:47,526 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-01-19 09:11:47,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,526 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:47,527 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:47,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 09:11:47,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:47,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-01-19 09:11:47,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619785617] [2022-01-19 09:11:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:47,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:47,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619785617] [2022-01-19 09:11:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619785617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:11:47,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:11:47,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 09:11:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373253011] [2022-01-19 09:11:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:47,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 09:11:47,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 09:11:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 09:11:47,873 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 09:11:47,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:47,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 09:11:47,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:47,950 INFO L129 PetriNetUnfolder]: 55/236 cut-off events. [2022-01-19 09:11:47,951 INFO L130 PetriNetUnfolder]: For 144/158 co-relation queries the response was YES. [2022-01-19 09:11:47,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 236 events. 55/236 cut-off events. For 144/158 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 901 event pairs, 7 based on Foata normal form. 5/235 useless extension candidates. Maximal degree in co-relation 494. Up to 94 conditions per place. [2022-01-19 09:11:47,953 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-01-19 09:11:47,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-01-19 09:11:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 09:11:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 09:11:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-01-19 09:11:47,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-01-19 09:11:47,955 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-01-19 09:11:47,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-01-19 09:11:47,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:47,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-01-19 09:11:47,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,958 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-01-19 09:11:47,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-01-19 09:11:47,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 09:11:47,964 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-01-19 09:11:47,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-01-19 09:11:47,965 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-01-19 09:11:47,965 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-01-19 09:11:47,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:47,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:47,966 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:47,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 09:11:47,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2022-01-19 09:11:47,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:47,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126643471] [2022-01-19 09:11:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:47,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:48,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126643471] [2022-01-19 09:11:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126643471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:11:48,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:11:48,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 09:11:48,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297128635] [2022-01-19 09:11:48,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:48,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 09:11:48,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 09:11:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-19 09:11:48,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 09:11:48,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:48,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:48,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 09:11:48,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:48,147 INFO L129 PetriNetUnfolder]: 50/227 cut-off events. [2022-01-19 09:11:48,148 INFO L130 PetriNetUnfolder]: For 199/203 co-relation queries the response was YES. [2022-01-19 09:11:48,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 227 events. 50/227 cut-off events. For 199/203 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 789 event pairs, 12 based on Foata normal form. 8/230 useless extension candidates. Maximal degree in co-relation 506. Up to 57 conditions per place. [2022-01-19 09:11:48,149 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-01-19 09:11:48,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-01-19 09:11:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 09:11:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 09:11:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-01-19 09:11:48,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-01-19 09:11:48,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-01-19 09:11:48,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-01-19 09:11:48,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:48,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-01-19 09:11:48,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:48,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:48,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:48,154 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-01-19 09:11:48,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-01-19 09:11:48,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-01-19 09:11:48,161 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-01-19 09:11:48,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-01-19 09:11:48,162 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-01-19 09:11:48,162 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-01-19 09:11:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:48,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:48,162 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:48,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 09:11:48,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1010787432, now seen corresponding path program 1 times [2022-01-19 09:11:48,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347674257] [2022-01-19 09:11:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:48,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:48,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347674257] [2022-01-19 09:11:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347674257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538470650] [2022-01-19 09:11:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:48,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:48,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:48,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 09:11:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:11:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:48,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:49,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538470650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:49,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:49,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 09:11:49,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952765581] [2022-01-19 09:11:49,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:49,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:11:49,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:11:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:11:49,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:49,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:49,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:49,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:49,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:50,906 INFO L129 PetriNetUnfolder]: 201/619 cut-off events. [2022-01-19 09:11:50,909 INFO L130 PetriNetUnfolder]: For 885/885 co-relation queries the response was YES. [2022-01-19 09:11:50,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 619 events. 201/619 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3349 event pairs, 9 based on Foata normal form. 18/632 useless extension candidates. Maximal degree in co-relation 1714. Up to 96 conditions per place. [2022-01-19 09:11:50,919 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-01-19 09:11:50,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-01-19 09:11:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 09:11:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 09:11:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-01-19 09:11:50,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-01-19 09:11:50,928 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-01-19 09:11:50,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-01-19 09:11:50,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:50,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-01-19 09:11:50,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:50,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:50,946 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:50,946 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-01-19 09:11:50,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-01-19 09:11:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-01-19 09:11:50,956 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-01-19 09:11:50,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2022-01-19 09:11:50,956 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-01-19 09:11:50,957 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-01-19 09:11:50,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:50,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:50,957 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:50,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 09:11:51,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 09:11:51,180 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 287847382, now seen corresponding path program 2 times [2022-01-19 09:11:51,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932892134] [2022-01-19 09:11:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:51,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:51,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932892134] [2022-01-19 09:11:51,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932892134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077910244] [2022-01-19 09:11:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:11:51,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:51,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:51,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 09:11:51,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:11:51,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 09:11:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:51,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077910244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:52,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:52,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-19 09:11:52,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072693688] [2022-01-19 09:11:52,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:52,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:11:52,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:11:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:11:52,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:52,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:52,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:52,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:52,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:52,404 INFO L129 PetriNetUnfolder]: 225/686 cut-off events. [2022-01-19 09:11:52,404 INFO L130 PetriNetUnfolder]: For 3231/3231 co-relation queries the response was YES. [2022-01-19 09:11:52,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 686 events. 225/686 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3957 event pairs, 18 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 2759. Up to 180 conditions per place. [2022-01-19 09:11:52,412 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-01-19 09:11:52,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-01-19 09:11:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 09:11:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 09:11:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-01-19 09:11:52,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-01-19 09:11:52,415 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-01-19 09:11:52,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-01-19 09:11:52,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:52,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-01-19 09:11:52,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:52,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:52,420 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:52,420 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-01-19 09:11:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-01-19 09:11:52,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-01-19 09:11:52,450 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-01-19 09:11:52,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2022-01-19 09:11:52,451 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-01-19 09:11:52,451 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-01-19 09:11:52,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:52,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:52,452 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:52,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:52,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:52,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1523094532, now seen corresponding path program 3 times [2022-01-19 09:11:52,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243557811] [2022-01-19 09:11:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:52,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:52,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243557811] [2022-01-19 09:11:52,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243557811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860648858] [2022-01-19 09:11:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:11:52,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:52,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:52,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 09:11:52,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 09:11:52,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:52,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:11:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:53,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:53,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860648858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:53,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 09:11:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310338278] [2022-01-19 09:11:53,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:53,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:11:53,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:11:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:11:53,461 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:53,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:53,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:53,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:53,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:54,834 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2022-01-19 09:11:54,835 INFO L130 PetriNetUnfolder]: For 6555/6555 co-relation queries the response was YES. [2022-01-19 09:11:54,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7333 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2022-01-19 09:11:54,846 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-01-19 09:11:54,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-01-19 09:11:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 09:11:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 09:11:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-01-19 09:11:54,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-01-19 09:11:54,850 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-01-19 09:11:54,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-01-19 09:11:54,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:54,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-01-19 09:11:54,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:54,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:54,859 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:54,859 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-01-19 09:11:54,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-01-19 09:11:54,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-01-19 09:11:54,912 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-01-19 09:11:54,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2022-01-19 09:11:54,913 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-01-19 09:11:54,913 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-01-19 09:11:54,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:54,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:54,914 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:54,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:55,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:55,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-01-19 09:11:55,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:55,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549414361] [2022-01-19 09:11:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:55,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:55,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:55,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549414361] [2022-01-19 09:11:55,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549414361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:11:55,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:11:55,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 09:11:55,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365096848] [2022-01-19 09:11:55,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:11:55,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 09:11:55,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 09:11:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-19 09:11:55,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:55,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:55,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:55,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:55,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:55,631 INFO L129 PetriNetUnfolder]: 314/871 cut-off events. [2022-01-19 09:11:55,632 INFO L130 PetriNetUnfolder]: For 8002/8002 co-relation queries the response was YES. [2022-01-19 09:11:55,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 871 events. 314/871 cut-off events. For 8002/8002 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4969 event pairs, 15 based on Foata normal form. 1/868 useless extension candidates. Maximal degree in co-relation 4788. Up to 279 conditions per place. [2022-01-19 09:11:55,644 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-01-19 09:11:55,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-01-19 09:11:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 09:11:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 09:11:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-01-19 09:11:55,646 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-01-19 09:11:55,646 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-01-19 09:11:55,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-01-19 09:11:55,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:55,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-01-19 09:11:55,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:55,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:55,653 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:55,653 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-01-19 09:11:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-01-19 09:11:55,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-01-19 09:11:55,720 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-01-19 09:11:55,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2022-01-19 09:11:55,721 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-01-19 09:11:55,721 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-01-19 09:11:55,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:55,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:55,722 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:55,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 09:11:55,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash -62005542, now seen corresponding path program 5 times [2022-01-19 09:11:55,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614605844] [2022-01-19 09:11:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:55,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:55,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614605844] [2022-01-19 09:11:55,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614605844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468934959] [2022-01-19 09:11:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:11:55,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:55,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:55,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:55,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 09:11:55,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:11:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 09:11:55,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:56,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:56,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468934959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:56,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:56,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-19 09:11:56,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017720418] [2022-01-19 09:11:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 09:11:56,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 09:11:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-19 09:11:56,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:56,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:56,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:56,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:56,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:57,303 INFO L129 PetriNetUnfolder]: 567/1576 cut-off events. [2022-01-19 09:11:57,303 INFO L130 PetriNetUnfolder]: For 13284/13284 co-relation queries the response was YES. [2022-01-19 09:11:57,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9283 conditions, 1576 events. 567/1576 cut-off events. For 13284/13284 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11129 event pairs, 18 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 9220. Up to 256 conditions per place. [2022-01-19 09:11:57,328 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-01-19 09:11:57,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-01-19 09:11:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 09:11:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 09:11:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-01-19 09:11:57,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-01-19 09:11:57,333 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-01-19 09:11:57,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-01-19 09:11:57,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:57,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-01-19 09:11:57,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:57,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:57,340 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:57,341 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-01-19 09:11:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-01-19 09:11:57,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-01-19 09:11:57,486 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-01-19 09:11:57,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2022-01-19 09:11:57,488 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-01-19 09:11:57,488 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-01-19 09:11:57,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:57,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:57,489 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:11:57,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:57,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 09:11:57,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1407155104, now seen corresponding path program 6 times [2022-01-19 09:11:57,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112254067] [2022-01-19 09:11:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:57,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:57,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112254067] [2022-01-19 09:11:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112254067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215778456] [2022-01-19 09:11:57,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:11:57,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:57,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:11:57,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 09:11:57,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 09:11:57,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:11:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:58,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:11:58,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215778456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:58,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:58,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 09:11:58,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640164248] [2022-01-19 09:11:58,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:58,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:11:58,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:11:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:11:58,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:11:58,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:11:58,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:58,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:11:58,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:00,114 INFO L129 PetriNetUnfolder]: 982/2557 cut-off events. [2022-01-19 09:12:00,114 INFO L130 PetriNetUnfolder]: For 28769/28769 co-relation queries the response was YES. [2022-01-19 09:12:00,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2557 events. 982/2557 cut-off events. For 28769/28769 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19689 event pairs, 12 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 17026. Up to 408 conditions per place. [2022-01-19 09:12:00,152 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-01-19 09:12:00,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-01-19 09:12:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 09:12:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 09:12:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-01-19 09:12:00,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-01-19 09:12:00,158 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-01-19 09:12:00,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-01-19 09:12:00,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:00,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-01-19 09:12:00,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:00,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:00,170 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:00,170 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-01-19 09:12:00,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-01-19 09:12:00,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-01-19 09:12:00,446 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-01-19 09:12:00,447 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2022-01-19 09:12:00,448 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-01-19 09:12:00,448 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-01-19 09:12:00,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:00,448 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:00,449 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:00,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 09:12:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:00,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1158995784, now seen corresponding path program 7 times [2022-01-19 09:12:00,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109002956] [2022-01-19 09:12:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:00,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:00,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109002956] [2022-01-19 09:12:00,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109002956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:12:00,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:12:00,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 09:12:00,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087990514] [2022-01-19 09:12:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:12:00,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 09:12:00,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 09:12:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-19 09:12:00,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:00,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:00,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:00,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:00,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:01,821 INFO L129 PetriNetUnfolder]: 1036/2642 cut-off events. [2022-01-19 09:12:01,821 INFO L130 PetriNetUnfolder]: For 37927/37927 co-relation queries the response was YES. [2022-01-19 09:12:01,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 2642 events. 1036/2642 cut-off events. For 37927/37927 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20325 event pairs, 36 based on Foata normal form. 1/2632 useless extension candidates. Maximal degree in co-relation 19955. Up to 1358 conditions per place. [2022-01-19 09:12:01,868 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-01-19 09:12:01,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-01-19 09:12:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 09:12:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 09:12:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-01-19 09:12:01,870 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-01-19 09:12:01,870 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-01-19 09:12:01,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-01-19 09:12:01,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:01,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-01-19 09:12:01,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:01,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:01,875 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:01,875 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-01-19 09:12:01,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-01-19 09:12:02,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-01-19 09:12:02,291 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-01-19 09:12:02,292 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2022-01-19 09:12:02,292 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-01-19 09:12:02,293 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-01-19 09:12:02,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:02,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:02,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:02,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 09:12:02,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1793899132, now seen corresponding path program 8 times [2022-01-19 09:12:02,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:02,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904964304] [2022-01-19 09:12:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:02,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:02,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904964304] [2022-01-19 09:12:02,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904964304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098652452] [2022-01-19 09:12:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:12:02,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:02,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:02,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 09:12:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:12:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:12:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:02,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 09:12:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098652452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:12:02,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 09:12:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-01-19 09:12:02,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271956946] [2022-01-19 09:12:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:12:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 09:12:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 09:12:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-19 09:12:02,772 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:02,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:02,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:02,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:02,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:04,402 INFO L129 PetriNetUnfolder]: 1119/2881 cut-off events. [2022-01-19 09:12:04,402 INFO L130 PetriNetUnfolder]: For 44562/44562 co-relation queries the response was YES. [2022-01-19 09:12:04,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22448 conditions, 2881 events. 1119/2881 cut-off events. For 44562/44562 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22704 event pairs, 49 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 22357. Up to 2190 conditions per place. [2022-01-19 09:12:04,447 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1359 selfloop transitions, 131 changer transitions 13/1544 dead transitions. [2022-01-19 09:12:04,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1544 transitions, 28749 flow [2022-01-19 09:12:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 09:12:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 09:12:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-01-19 09:12:04,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-01-19 09:12:04,449 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-01-19 09:12:04,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-01-19 09:12:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:04,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-01-19 09:12:04,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:04,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:04,453 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:04,453 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 18 states and 1006 transitions. [2022-01-19 09:12:04,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1544 transitions, 28749 flow [2022-01-19 09:12:04,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1544 transitions, 28653 flow, removed 48 selfloop flow, removed 3 redundant places. [2022-01-19 09:12:04,850 INFO L242 Difference]: Finished difference. Result has 353 places, 1488 transitions, 25330 flow [2022-01-19 09:12:04,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25330, PETRI_PLACES=353, PETRI_TRANSITIONS=1488} [2022-01-19 09:12:04,852 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 279 predicate places. [2022-01-19 09:12:04,852 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 1488 transitions, 25330 flow [2022-01-19 09:12:04,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:04,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:04,853 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:04,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-19 09:12:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:05,064 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash 82329012, now seen corresponding path program 9 times [2022-01-19 09:12:05,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:05,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772166858] [2022-01-19 09:12:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:05,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:05,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:05,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772166858] [2022-01-19 09:12:05,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772166858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:05,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907364383] [2022-01-19 09:12:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:12:05,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:05,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:05,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:05,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 09:12:05,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 09:12:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:12:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:05,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 09:12:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907364383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:12:05,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 09:12:05,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-01-19 09:12:05,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143304246] [2022-01-19 09:12:05,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:12:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 09:12:05,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 09:12:05,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-19 09:12:05,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:05,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1488 transitions, 25330 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:05,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:05,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:05,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:07,214 INFO L129 PetriNetUnfolder]: 1321/3449 cut-off events. [2022-01-19 09:12:07,214 INFO L130 PetriNetUnfolder]: For 56686/56686 co-relation queries the response was YES. [2022-01-19 09:12:07,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3449 events. 1321/3449 cut-off events. For 56686/56686 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28633 event pairs, 51 based on Foata normal form. 1/3439 useless extension candidates. Maximal degree in co-relation 27226. Up to 2392 conditions per place. [2022-01-19 09:12:07,265 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1537 selfloop transitions, 196 changer transitions 10/1784 dead transitions. [2022-01-19 09:12:07,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1784 transitions, 34189 flow [2022-01-19 09:12:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 09:12:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 09:12:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-01-19 09:12:07,267 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-01-19 09:12:07,267 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-01-19 09:12:07,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-01-19 09:12:07,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:07,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-01-19 09:12:07,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:07,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:07,271 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:07,271 INFO L186 Difference]: Start difference. First operand has 353 places, 1488 transitions, 25330 flow. Second operand 16 states and 910 transitions. [2022-01-19 09:12:07,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1784 transitions, 34189 flow [2022-01-19 09:12:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1784 transitions, 33987 flow, removed 83 selfloop flow, removed 7 redundant places. [2022-01-19 09:12:07,905 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28977 flow [2022-01-19 09:12:07,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25154, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=28977, PETRI_PLACES=369, PETRI_TRANSITIONS=1646} [2022-01-19 09:12:07,906 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2022-01-19 09:12:07,906 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28977 flow [2022-01-19 09:12:07,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:07,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:07,907 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:07,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 09:12:08,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 09:12:08,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 540301936, now seen corresponding path program 10 times [2022-01-19 09:12:08,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:08,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85072686] [2022-01-19 09:12:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:08,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:08,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85072686] [2022-01-19 09:12:08,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85072686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938886082] [2022-01-19 09:12:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:12:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:08,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:08,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:08,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 09:12:08,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:12:08,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 09:12:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:08,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:12:08,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938886082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:08,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:08,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 09:12:08,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250340115] [2022-01-19 09:12:08,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:08,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:12:08,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:12:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:12:08,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:08,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1646 transitions, 28977 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:08,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:08,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:08,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:11,987 INFO L129 PetriNetUnfolder]: 1622/4164 cut-off events. [2022-01-19 09:12:11,987 INFO L130 PetriNetUnfolder]: For 82597/82597 co-relation queries the response was YES. [2022-01-19 09:12:12,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35136 conditions, 4164 events. 1622/4164 cut-off events. For 82597/82597 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35778 event pairs, 48 based on Foata normal form. 27/4176 useless extension candidates. Maximal degree in co-relation 35028. Up to 1770 conditions per place. [2022-01-19 09:12:12,048 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 1090 selfloop transitions, 1089 changer transitions 11/2231 dead transitions. [2022-01-19 09:12:12,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 2231 transitions, 44432 flow [2022-01-19 09:12:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-19 09:12:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-01-19 09:12:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3263 transitions. [2022-01-19 09:12:12,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.647420634920635 [2022-01-19 09:12:12,052 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3263 transitions. [2022-01-19 09:12:12,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3263 transitions. [2022-01-19 09:12:12,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:12,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3263 transitions. [2022-01-19 09:12:12,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.38333333333333) internal successors, (3263), 60 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:12,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:12,063 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:12,063 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28977 flow. Second operand 60 states and 3263 transitions. [2022-01-19 09:12:12,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 2231 transitions, 44432 flow [2022-01-19 09:12:12,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2231 transitions, 44144 flow, removed 128 selfloop flow, removed 6 redundant places. [2022-01-19 09:12:13,040 INFO L242 Difference]: Finished difference. Result has 451 places, 2125 transitions, 42403 flow [2022-01-19 09:12:13,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28755, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=42403, PETRI_PLACES=451, PETRI_TRANSITIONS=2125} [2022-01-19 09:12:13,042 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 377 predicate places. [2022-01-19 09:12:13,042 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 2125 transitions, 42403 flow [2022-01-19 09:12:13,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:13,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:13,043 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:13,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 09:12:13,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 09:12:13,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 564935951, now seen corresponding path program 11 times [2022-01-19 09:12:13,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830074534] [2022-01-19 09:12:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:13,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:13,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830074534] [2022-01-19 09:12:13,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830074534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196755627] [2022-01-19 09:12:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:12:13,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:13,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:13,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:13,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 09:12:13,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:12:13,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:13,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:12:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:13,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:13,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196755627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:13,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:13,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 09:12:13,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681976185] [2022-01-19 09:12:13,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:12:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:12:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:12:13,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:13,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2125 transitions, 42403 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:13,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:13,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:13,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:16,518 INFO L129 PetriNetUnfolder]: 1784/4581 cut-off events. [2022-01-19 09:12:16,518 INFO L130 PetriNetUnfolder]: For 123458/123458 co-relation queries the response was YES. [2022-01-19 09:12:16,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42750 conditions, 4581 events. 1784/4581 cut-off events. For 123458/123458 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40291 event pairs, 20 based on Foata normal form. 20/4600 useless extension candidates. Maximal degree in co-relation 42613. Up to 1658 conditions per place. [2022-01-19 09:12:16,614 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1530 selfloop transitions, 836 changer transitions 25/2432 dead transitions. [2022-01-19 09:12:16,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 2432 transitions, 53222 flow [2022-01-19 09:12:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 09:12:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 09:12:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2022-01-19 09:12:16,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2022-01-19 09:12:16,617 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2022-01-19 09:12:16,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2022-01-19 09:12:16,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:16,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2022-01-19 09:12:16,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:16,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:16,621 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:16,621 INFO L186 Difference]: Start difference. First operand has 451 places, 2125 transitions, 42403 flow. Second operand 19 states and 1071 transitions. [2022-01-19 09:12:16,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 2432 transitions, 53222 flow [2022-01-19 09:12:18,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2432 transitions, 52251 flow, removed 467 selfloop flow, removed 9 redundant places. [2022-01-19 09:12:18,427 INFO L242 Difference]: Finished difference. Result has 467 places, 2280 transitions, 47920 flow [2022-01-19 09:12:18,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=41474, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=47920, PETRI_PLACES=467, PETRI_TRANSITIONS=2280} [2022-01-19 09:12:18,430 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 393 predicate places. [2022-01-19 09:12:18,430 INFO L470 AbstractCegarLoop]: Abstraction has has 467 places, 2280 transitions, 47920 flow [2022-01-19 09:12:18,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:18,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:18,430 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:18,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 09:12:18,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 09:12:18,653 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash 112799897, now seen corresponding path program 12 times [2022-01-19 09:12:18,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:18,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724047736] [2022-01-19 09:12:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:18,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:18,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724047736] [2022-01-19 09:12:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724047736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156505915] [2022-01-19 09:12:18,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:12:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:18,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:18,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 09:12:18,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 09:12:18,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:12:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156505915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:19,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:19,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-19 09:12:19,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957575601] [2022-01-19 09:12:19,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:19,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 09:12:19,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 09:12:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-19 09:12:19,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:19,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2280 transitions, 47920 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:19,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:19,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:19,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:23,889 INFO L129 PetriNetUnfolder]: 2209/5776 cut-off events. [2022-01-19 09:12:23,890 INFO L130 PetriNetUnfolder]: For 196158/196158 co-relation queries the response was YES. [2022-01-19 09:12:23,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 5776 events. 2209/5776 cut-off events. For 196158/196158 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51911 event pairs, 24 based on Foata normal form. 27/5801 useless extension candidates. Maximal degree in co-relation 57336. Up to 1537 conditions per place. [2022-01-19 09:12:23,992 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1427 selfloop transitions, 1585 changer transitions 34/3087 dead transitions. [2022-01-19 09:12:23,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 3087 transitions, 72012 flow [2022-01-19 09:12:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 09:12:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 09:12:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2022-01-19 09:12:23,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2022-01-19 09:12:23,997 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2022-01-19 09:12:23,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2022-01-19 09:12:23,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:23,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2022-01-19 09:12:24,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 55.23880597014925) internal successors, (3701), 67 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:24,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:24,011 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:24,011 INFO L186 Difference]: Start difference. First operand has 467 places, 2280 transitions, 47920 flow. Second operand 67 states and 3701 transitions. [2022-01-19 09:12:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 3087 transitions, 72012 flow [2022-01-19 09:12:26,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 3087 transitions, 71402 flow, removed 252 selfloop flow, removed 8 redundant places. [2022-01-19 09:12:26,177 INFO L242 Difference]: Finished difference. Result has 560 places, 2887 transitions, 67956 flow [2022-01-19 09:12:26,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=47589, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=67956, PETRI_PLACES=560, PETRI_TRANSITIONS=2887} [2022-01-19 09:12:26,179 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 486 predicate places. [2022-01-19 09:12:26,179 INFO L470 AbstractCegarLoop]: Abstraction has has 560 places, 2887 transitions, 67956 flow [2022-01-19 09:12:26,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:26,179 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:26,179 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:26,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-19 09:12:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 09:12:26,380 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1113820109, now seen corresponding path program 13 times [2022-01-19 09:12:26,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712238943] [2022-01-19 09:12:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:26,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:26,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712238943] [2022-01-19 09:12:26,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712238943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622038079] [2022-01-19 09:12:26,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:12:26,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:26,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:26,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 09:12:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 09:12:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622038079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:27,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:27,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 09:12:27,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771001444] [2022-01-19 09:12:27,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:27,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:12:27,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:12:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:12:27,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:27,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2887 transitions, 67956 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:27,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:27,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:27,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:33,300 INFO L129 PetriNetUnfolder]: 2771/6897 cut-off events. [2022-01-19 09:12:33,300 INFO L130 PetriNetUnfolder]: For 252992/252992 co-relation queries the response was YES. [2022-01-19 09:12:33,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76884 conditions, 6897 events. 2771/6897 cut-off events. For 252992/252992 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 62086 event pairs, 63 based on Foata normal form. 4/6871 useless extension candidates. Maximal degree in co-relation 76706. Up to 2758 conditions per place. [2022-01-19 09:12:33,438 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2004 selfloop transitions, 1770 changer transitions 16/3831 dead transitions. [2022-01-19 09:12:33,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 3831 transitions, 98908 flow [2022-01-19 09:12:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 09:12:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 09:12:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2022-01-19 09:12:33,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2022-01-19 09:12:33,442 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2022-01-19 09:12:33,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2022-01-19 09:12:33,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:33,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2022-01-19 09:12:33,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.75) internal successors, (2628), 48 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:33,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:33,450 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:33,450 INFO L186 Difference]: Start difference. First operand has 560 places, 2887 transitions, 67956 flow. Second operand 48 states and 2628 transitions. [2022-01-19 09:12:33,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 3831 transitions, 98908 flow [2022-01-19 09:12:37,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 3831 transitions, 95167 flow, removed 1769 selfloop flow, removed 10 redundant places. [2022-01-19 09:12:37,627 INFO L242 Difference]: Finished difference. Result has 618 places, 3618 transitions, 90388 flow [2022-01-19 09:12:37,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=64885, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=90388, PETRI_PLACES=618, PETRI_TRANSITIONS=3618} [2022-01-19 09:12:37,630 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 544 predicate places. [2022-01-19 09:12:37,630 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 3618 transitions, 90388 flow [2022-01-19 09:12:37,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:37,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:37,630 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:37,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 09:12:37,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 09:12:37,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1983119535, now seen corresponding path program 14 times [2022-01-19 09:12:37,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:37,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963232814] [2022-01-19 09:12:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:37,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:37,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963232814] [2022-01-19 09:12:37,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963232814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626083623] [2022-01-19 09:12:37,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:12:37,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:37,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:37,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:37,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 09:12:37,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:12:37,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:12:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:38,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626083623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:38,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:38,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-19 09:12:38,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746831928] [2022-01-19 09:12:38,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:38,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 09:12:38,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 09:12:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-19 09:12:38,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:38,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3618 transitions, 90388 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:38,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:38,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:38,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:46,153 INFO L129 PetriNetUnfolder]: 2798/7022 cut-off events. [2022-01-19 09:12:46,153 INFO L130 PetriNetUnfolder]: For 232993/232993 co-relation queries the response was YES. [2022-01-19 09:12:46,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78875 conditions, 7022 events. 2798/7022 cut-off events. For 232993/232993 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63218 event pairs, 24 based on Foata normal form. 34/7054 useless extension candidates. Maximal degree in co-relation 78679. Up to 2250 conditions per place. [2022-01-19 09:12:46,396 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1859 selfloop transitions, 1916 changer transitions 26/3842 dead transitions. [2022-01-19 09:12:46,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 3842 transitions, 102983 flow [2022-01-19 09:12:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-19 09:12:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-19 09:12:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2856 transitions. [2022-01-19 09:12:46,399 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-01-19 09:12:46,399 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2856 transitions. [2022-01-19 09:12:46,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2856 transitions. [2022-01-19 09:12:46,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:46,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2856 transitions. [2022-01-19 09:12:46,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.92307692307692) internal successors, (2856), 52 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:46,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:46,408 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:46,408 INFO L186 Difference]: Start difference. First operand has 618 places, 3618 transitions, 90388 flow. Second operand 52 states and 2856 transitions. [2022-01-19 09:12:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 3842 transitions, 102983 flow [2022-01-19 09:12:50,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 3842 transitions, 99752 flow, removed 1518 selfloop flow, removed 13 redundant places. [2022-01-19 09:12:50,712 INFO L242 Difference]: Finished difference. Result has 655 places, 3708 transitions, 95863 flow [2022-01-19 09:12:50,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=86776, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=95863, PETRI_PLACES=655, PETRI_TRANSITIONS=3708} [2022-01-19 09:12:50,714 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 581 predicate places. [2022-01-19 09:12:50,715 INFO L470 AbstractCegarLoop]: Abstraction has has 655 places, 3708 transitions, 95863 flow [2022-01-19 09:12:50,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:50,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:50,715 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:12:50,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 09:12:50,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:50,930 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2116477245, now seen corresponding path program 15 times [2022-01-19 09:12:50,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437340213] [2022-01-19 09:12:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:50,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:12:51,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437340213] [2022-01-19 09:12:51,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437340213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865780742] [2022-01-19 09:12:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:12:51,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:51,002 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:12:51,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 09:12:51,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 09:12:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:12:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:51,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:51,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865780742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:51,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:51,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 09:12:51,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342416459] [2022-01-19 09:12:51,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:51,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:12:51,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:12:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:12:51,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:12:51,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 3708 transitions, 95863 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:12:51,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:51,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:12:51,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:01,611 INFO L129 PetriNetUnfolder]: 3715/9539 cut-off events. [2022-01-19 09:13:01,611 INFO L130 PetriNetUnfolder]: For 313244/313244 co-relation queries the response was YES. [2022-01-19 09:13:01,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107736 conditions, 9539 events. 3715/9539 cut-off events. For 313244/313244 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 92849 event pairs, 69 based on Foata normal form. 4/9493 useless extension candidates. Maximal degree in co-relation 107537. Up to 2018 conditions per place. [2022-01-19 09:13:01,810 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1542 selfloop transitions, 3399 changer transitions 8/4990 dead transitions. [2022-01-19 09:13:01,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 4990 transitions, 141494 flow [2022-01-19 09:13:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 09:13:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 09:13:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2104 transitions. [2022-01-19 09:13:01,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591478696741855 [2022-01-19 09:13:01,812 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2104 transitions. [2022-01-19 09:13:01,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2104 transitions. [2022-01-19 09:13:01,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:01,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2104 transitions. [2022-01-19 09:13:01,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.36842105263158) internal successors, (2104), 38 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:01,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:01,816 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:01,816 INFO L186 Difference]: Start difference. First operand has 655 places, 3708 transitions, 95863 flow. Second operand 38 states and 2104 transitions. [2022-01-19 09:13:01,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 4990 transitions, 141494 flow [2022-01-19 09:13:07,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 4990 transitions, 137010 flow, removed 243 selfloop flow, removed 26 redundant places. [2022-01-19 09:13:08,122 INFO L242 Difference]: Finished difference. Result has 687 places, 4777 transitions, 136291 flow [2022-01-19 09:13:08,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92578, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=136291, PETRI_PLACES=687, PETRI_TRANSITIONS=4777} [2022-01-19 09:13:08,126 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-01-19 09:13:08,126 INFO L470 AbstractCegarLoop]: Abstraction has has 687 places, 4777 transitions, 136291 flow [2022-01-19 09:13:08,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:08,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:08,127 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:13:08,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 09:13:08,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:08,349 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1543840883, now seen corresponding path program 16 times [2022-01-19 09:13:08,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551442755] [2022-01-19 09:13:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:08,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:08,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:08,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551442755] [2022-01-19 09:13:08,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551442755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:08,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540537340] [2022-01-19 09:13:08,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:13:08,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:08,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:13:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 09:13:08,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:13:08,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:13:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 09:13:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:08,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:09,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540537340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:09,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:09,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 23 [2022-01-19 09:13:09,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951444232] [2022-01-19 09:13:09,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:09,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:13:09,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:13:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:13:09,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:13:09,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 4777 transitions, 136291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:09,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:09,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:13:09,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:23,161 INFO L129 PetriNetUnfolder]: 3940/10109 cut-off events. [2022-01-19 09:13:23,161 INFO L130 PetriNetUnfolder]: For 398689/398689 co-relation queries the response was YES. [2022-01-19 09:13:23,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122816 conditions, 10109 events. 3940/10109 cut-off events. For 398689/398689 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 99288 event pairs, 94 based on Foata normal form. 61/10094 useless extension candidates. Maximal degree in co-relation 122601. Up to 4635 conditions per place. [2022-01-19 09:13:23,384 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 3748 selfloop transitions, 1454 changer transitions 1/5244 dead transitions. [2022-01-19 09:13:23,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 5244 transitions, 161113 flow [2022-01-19 09:13:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 09:13:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 09:13:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1993 transitions. [2022-01-19 09:13:23,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590608465608465 [2022-01-19 09:13:23,386 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1993 transitions. [2022-01-19 09:13:23,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1993 transitions. [2022-01-19 09:13:23,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:23,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1993 transitions. [2022-01-19 09:13:23,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.361111111111114) internal successors, (1993), 36 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:23,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:23,392 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:23,392 INFO L186 Difference]: Start difference. First operand has 687 places, 4777 transitions, 136291 flow. Second operand 36 states and 1993 transitions. [2022-01-19 09:13:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 5244 transitions, 161113 flow [2022-01-19 09:13:32,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 5244 transitions, 159070 flow, removed 943 selfloop flow, removed 10 redundant places. [2022-01-19 09:13:32,744 INFO L242 Difference]: Finished difference. Result has 737 places, 5087 transitions, 149960 flow [2022-01-19 09:13:32,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=134616, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=149960, PETRI_PLACES=737, PETRI_TRANSITIONS=5087} [2022-01-19 09:13:32,747 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 663 predicate places. [2022-01-19 09:13:32,748 INFO L470 AbstractCegarLoop]: Abstraction has has 737 places, 5087 transitions, 149960 flow [2022-01-19 09:13:32,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:32,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:32,748 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:13:32,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 09:13:32,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:32,948 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1588142831, now seen corresponding path program 17 times [2022-01-19 09:13:32,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:32,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074035977] [2022-01-19 09:13:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:32,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:33,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074035977] [2022-01-19 09:13:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074035977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674488642] [2022-01-19 09:13:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:13:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:33,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:13:33,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 09:13:33,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:13:33,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:13:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 09:13:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:33,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674488642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:33,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 09:13:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067989687] [2022-01-19 09:13:33,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:33,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:13:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:13:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:13:33,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:13:33,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 5087 transitions, 149960 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:33,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:33,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:13:33,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:50,848 INFO L129 PetriNetUnfolder]: 4407/11083 cut-off events. [2022-01-19 09:13:50,848 INFO L130 PetriNetUnfolder]: For 459168/459168 co-relation queries the response was YES. [2022-01-19 09:13:51,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140125 conditions, 11083 events. 4407/11083 cut-off events. For 459168/459168 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 109098 event pairs, 119 based on Foata normal form. 6/11010 useless extension candidates. Maximal degree in co-relation 139886. Up to 5817 conditions per place. [2022-01-19 09:13:51,108 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3862 selfloop transitions, 1876 changer transitions 15/5794 dead transitions. [2022-01-19 09:13:51,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 5794 transitions, 182280 flow [2022-01-19 09:13:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 09:13:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 09:13:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1597 transitions. [2022-01-19 09:13:51,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6555829228243021 [2022-01-19 09:13:51,110 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1597 transitions. [2022-01-19 09:13:51,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1597 transitions. [2022-01-19 09:13:51,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:51,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1597 transitions. [2022-01-19 09:13:51,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.06896551724138) internal successors, (1597), 29 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:51,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:51,115 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:13:51,115 INFO L186 Difference]: Start difference. First operand has 737 places, 5087 transitions, 149960 flow. Second operand 29 states and 1597 transitions. [2022-01-19 09:13:51,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 5794 transitions, 182280 flow [2022-01-19 09:14:01,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 5794 transitions, 180633 flow, removed 800 selfloop flow, removed 7 redundant places. [2022-01-19 09:14:01,768 INFO L242 Difference]: Finished difference. Result has 769 places, 5617 transitions, 172264 flow [2022-01-19 09:14:01,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148541, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=172264, PETRI_PLACES=769, PETRI_TRANSITIONS=5617} [2022-01-19 09:14:01,772 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 695 predicate places. [2022-01-19 09:14:01,772 INFO L470 AbstractCegarLoop]: Abstraction has has 769 places, 5617 transitions, 172264 flow [2022-01-19 09:14:01,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:01,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:14:01,772 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:14:01,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 09:14:01,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-19 09:14:01,973 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:14:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:14:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 723500355, now seen corresponding path program 18 times [2022-01-19 09:14:01,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:14:01,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516752985] [2022-01-19 09:14:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:14:01,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:14:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:02,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:14:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516752985] [2022-01-19 09:14:02,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516752985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:14:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343272757] [2022-01-19 09:14:02,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:14:02,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:14:02,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:14:02,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 09:14:02,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 09:14:02,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:14:02,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:14:02,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:14:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:14:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343272757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:14:02,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:14:02,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 09:14:02,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74538099] [2022-01-19 09:14:02,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:14:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:14:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:14:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:14:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:14:02,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:14:02,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 5617 transitions, 172264 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:02,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:14:02,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:14:02,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:14:23,775 INFO L129 PetriNetUnfolder]: 4673/11878 cut-off events. [2022-01-19 09:14:23,775 INFO L130 PetriNetUnfolder]: For 540076/540076 co-relation queries the response was YES. [2022-01-19 09:14:23,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154462 conditions, 11878 events. 4673/11878 cut-off events. For 540076/540076 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 119179 event pairs, 131 based on Foata normal form. 5/11794 useless extension candidates. Maximal degree in co-relation 154212. Up to 3663 conditions per place. [2022-01-19 09:14:24,061 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2623 selfloop transitions, 3399 changer transitions 13/6076 dead transitions. [2022-01-19 09:14:24,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 6076 transitions, 199520 flow [2022-01-19 09:14:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 09:14:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 09:14:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1920 transitions. [2022-01-19 09:14:24,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2022-01-19 09:14:24,065 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1920 transitions. [2022-01-19 09:14:24,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1920 transitions. [2022-01-19 09:14:24,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:14:24,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1920 transitions. [2022-01-19 09:14:24,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 54.857142857142854) internal successors, (1920), 35 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:24,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:24,070 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:24,070 INFO L186 Difference]: Start difference. First operand has 769 places, 5617 transitions, 172264 flow. Second operand 35 states and 1920 transitions. [2022-01-19 09:14:24,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 6076 transitions, 199520 flow [2022-01-19 09:14:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 6076 transitions, 198511 flow, removed 399 selfloop flow, removed 14 redundant places. [2022-01-19 09:14:36,728 INFO L242 Difference]: Finished difference. Result has 798 places, 5969 transitions, 194434 flow [2022-01-19 09:14:36,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=171359, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3060, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=194434, PETRI_PLACES=798, PETRI_TRANSITIONS=5969} [2022-01-19 09:14:36,733 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 724 predicate places. [2022-01-19 09:14:36,733 INFO L470 AbstractCegarLoop]: Abstraction has has 798 places, 5969 transitions, 194434 flow [2022-01-19 09:14:36,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:36,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:14:36,733 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:14:36,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 09:14:36,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:36,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:14:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:14:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -319592237, now seen corresponding path program 19 times [2022-01-19 09:14:36,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:14:36,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538463336] [2022-01-19 09:14:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:14:36,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:14:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:37,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:14:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538463336] [2022-01-19 09:14:37,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538463336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:14:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016683846] [2022-01-19 09:14:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:14:37,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:14:37,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:14:37,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 09:14:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 09:14:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:14:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:14:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016683846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:14:37,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:14:37,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 09:14:37,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160800369] [2022-01-19 09:14:37,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:14:37,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:14:37,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:14:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:14:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:14:37,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:14:37,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 798 places, 5969 transitions, 194434 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:14:37,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:14:37,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:14:37,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:15:01,472 INFO L129 PetriNetUnfolder]: 4898/12334 cut-off events. [2022-01-19 09:15:01,472 INFO L130 PetriNetUnfolder]: For 635316/635316 co-relation queries the response was YES. [2022-01-19 09:15:01,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168759 conditions, 12334 events. 4898/12334 cut-off events. For 635316/635316 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 124054 event pairs, 125 based on Foata normal form. 3/12250 useless extension candidates. Maximal degree in co-relation 168500. Up to 6642 conditions per place. [2022-01-19 09:15:01,933 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4300 selfloop transitions, 2113 changer transitions 16/6470 dead transitions. [2022-01-19 09:15:01,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 6470 transitions, 222673 flow [2022-01-19 09:15:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 09:15:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 09:15:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2150 transitions. [2022-01-19 09:15:01,935 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6562881562881563 [2022-01-19 09:15:01,935 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2150 transitions. [2022-01-19 09:15:01,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2150 transitions. [2022-01-19 09:15:01,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:15:01,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2150 transitions. [2022-01-19 09:15:01,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.12820512820513) internal successors, (2150), 39 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:01,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:01,940 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:01,940 INFO L186 Difference]: Start difference. First operand has 798 places, 5969 transitions, 194434 flow. Second operand 39 states and 2150 transitions. [2022-01-19 09:15:01,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 6470 transitions, 222673 flow [2022-01-19 09:15:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 6470 transitions, 218575 flow, removed 863 selfloop flow, removed 12 redundant places. [2022-01-19 09:15:16,035 INFO L242 Difference]: Finished difference. Result has 843 places, 6316 transitions, 210091 flow [2022-01-19 09:15:16,040 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=190529, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=210091, PETRI_PLACES=843, PETRI_TRANSITIONS=6316} [2022-01-19 09:15:16,040 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 769 predicate places. [2022-01-19 09:15:16,040 INFO L470 AbstractCegarLoop]: Abstraction has has 843 places, 6316 transitions, 210091 flow [2022-01-19 09:15:16,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:16,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:15:16,041 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:15:16,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-19 09:15:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:15:16,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:15:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:15:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1183592429, now seen corresponding path program 20 times [2022-01-19 09:15:16,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:15:16,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339220820] [2022-01-19 09:15:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:15:16,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:15:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:15:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:15:16,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:15:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339220820] [2022-01-19 09:15:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339220820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:15:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371446346] [2022-01-19 09:15:16,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:15:16,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:15:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:15:16,344 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:15:16,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 09:15:16,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:15:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:15:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:15:16,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:15:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:15:16,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:15:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:15:16,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371446346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:15:16,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:15:16,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 09:15:16,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833906980] [2022-01-19 09:15:16,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:15:16,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:15:16,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:15:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:15:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:15:16,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:15:16,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 6316 transitions, 210091 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:16,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:15:16,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:15:16,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:15:45,501 INFO L129 PetriNetUnfolder]: 5122/12927 cut-off events. [2022-01-19 09:15:45,501 INFO L130 PetriNetUnfolder]: For 692742/692742 co-relation queries the response was YES. [2022-01-19 09:15:45,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181593 conditions, 12927 events. 5122/12927 cut-off events. For 692742/692742 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 131508 event pairs, 120 based on Foata normal form. 4/12848 useless extension candidates. Maximal degree in co-relation 181316. Up to 3956 conditions per place. [2022-01-19 09:15:45,857 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2847 selfloop transitions, 3893 changer transitions 4/6785 dead transitions. [2022-01-19 09:15:45,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 6785 transitions, 239868 flow [2022-01-19 09:15:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 09:15:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 09:15:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2137 transitions. [2022-01-19 09:15:45,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6523199023199023 [2022-01-19 09:15:45,859 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2137 transitions. [2022-01-19 09:15:45,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2137 transitions. [2022-01-19 09:15:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:15:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2137 transitions. [2022-01-19 09:15:45,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 54.794871794871796) internal successors, (2137), 39 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:45,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:45,865 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:15:45,865 INFO L186 Difference]: Start difference. First operand has 843 places, 6316 transitions, 210091 flow. Second operand 39 states and 2137 transitions. [2022-01-19 09:15:45,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 6785 transitions, 239868 flow [2022-01-19 09:16:02,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 6785 transitions, 237697 flow, removed 926 selfloop flow, removed 14 redundant places. [2022-01-19 09:16:02,680 INFO L242 Difference]: Finished difference. Result has 887 places, 6681 transitions, 233654 flow [2022-01-19 09:16:02,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208054, PETRI_DIFFERENCE_MINUEND_PLACES=829, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=233654, PETRI_PLACES=887, PETRI_TRANSITIONS=6681} [2022-01-19 09:16:02,686 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 813 predicate places. [2022-01-19 09:16:02,686 INFO L470 AbstractCegarLoop]: Abstraction has has 887 places, 6681 transitions, 233654 flow [2022-01-19 09:16:02,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:02,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:16:02,686 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:16:02,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 09:16:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:16:02,899 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:16:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:16:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2099218343, now seen corresponding path program 21 times [2022-01-19 09:16:02,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:16:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691294539] [2022-01-19 09:16:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:16:02,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:16:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:16:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:16:02,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:16:02,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691294539] [2022-01-19 09:16:02,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691294539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:16:02,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585701288] [2022-01-19 09:16:02,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:16:02,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:16:02,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:16:02,984 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:16:02,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 09:16:03,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 09:16:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:16:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:16:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:16:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:16:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:16:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:16:03,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585701288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:16:03,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:16:03,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 09:16:03,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688172520] [2022-01-19 09:16:03,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:16:03,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:16:03,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:16:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:16:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:16:03,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:16:03,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 6681 transitions, 233654 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:03,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:16:03,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:16:03,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:16:35,745 INFO L129 PetriNetUnfolder]: 5135/13074 cut-off events. [2022-01-19 09:16:35,746 INFO L130 PetriNetUnfolder]: For 775948/775948 co-relation queries the response was YES. [2022-01-19 09:16:36,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189143 conditions, 13074 events. 5135/13074 cut-off events. For 775948/775948 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 133925 event pairs, 32 based on Foata normal form. 13/13080 useless extension candidates. Maximal degree in co-relation 188849. Up to 4043 conditions per place. [2022-01-19 09:16:36,111 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3466 selfloop transitions, 3295 changer transitions 7/6809 dead transitions. [2022-01-19 09:16:36,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 6809 transitions, 250681 flow [2022-01-19 09:16:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 09:16:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 09:16:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1938 transitions. [2022-01-19 09:16:36,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591836734693878 [2022-01-19 09:16:36,114 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1938 transitions. [2022-01-19 09:16:36,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1938 transitions. [2022-01-19 09:16:36,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:16:36,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1938 transitions. [2022-01-19 09:16:36,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.371428571428574) internal successors, (1938), 35 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:36,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:36,119 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:36,119 INFO L186 Difference]: Start difference. First operand has 887 places, 6681 transitions, 233654 flow. Second operand 35 states and 1938 transitions. [2022-01-19 09:16:36,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 6809 transitions, 250681 flow [2022-01-19 09:16:54,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 6809 transitions, 248282 flow, removed 1158 selfloop flow, removed 11 redundant places. [2022-01-19 09:16:54,883 INFO L242 Difference]: Finished difference. Result has 913 places, 6700 transitions, 238977 flow [2022-01-19 09:16:54,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=230994, PETRI_DIFFERENCE_MINUEND_PLACES=874, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=238977, PETRI_PLACES=913, PETRI_TRANSITIONS=6700} [2022-01-19 09:16:54,887 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 839 predicate places. [2022-01-19 09:16:54,888 INFO L470 AbstractCegarLoop]: Abstraction has has 913 places, 6700 transitions, 238977 flow [2022-01-19 09:16:54,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:54,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:16:54,888 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:16:54,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 09:16:55,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 09:16:55,091 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:16:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:16:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -550960905, now seen corresponding path program 22 times [2022-01-19 09:16:55,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:16:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879971896] [2022-01-19 09:16:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:16:55,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:16:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:16:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:16:55,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:16:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879971896] [2022-01-19 09:16:55,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879971896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:16:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147284182] [2022-01-19 09:16:55,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:16:55,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:16:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:16:55,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:16:55,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 09:16:55,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:16:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:16:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:16:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:16:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:16:55,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:16:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:16:55,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147284182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:16:55,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:16:55,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 09:16:55,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750561714] [2022-01-19 09:16:55,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:16:55,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:16:55,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:16:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:16:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:16:55,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:16:55,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 6700 transitions, 238977 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:16:55,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:16:55,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:16:55,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:17:28,849 INFO L129 PetriNetUnfolder]: 5177/13287 cut-off events. [2022-01-19 09:17:28,849 INFO L130 PetriNetUnfolder]: For 812691/812691 co-relation queries the response was YES. [2022-01-19 09:17:29,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194351 conditions, 13287 events. 5177/13287 cut-off events. For 812691/812691 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136614 event pairs, 35 based on Foata normal form. 14/13292 useless extension candidates. Maximal degree in co-relation 194052. Up to 3320 conditions per place. [2022-01-19 09:17:29,357 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3101 selfloop transitions, 3835 changer transitions 7/6984 dead transitions. [2022-01-19 09:17:29,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 6984 transitions, 260261 flow [2022-01-19 09:17:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 09:17:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 09:17:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2006 transitions. [2022-01-19 09:17:29,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633597883597884 [2022-01-19 09:17:29,359 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2006 transitions. [2022-01-19 09:17:29,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2006 transitions. [2022-01-19 09:17:29,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:17:29,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2006 transitions. [2022-01-19 09:17:29,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.72222222222222) internal successors, (2006), 36 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:17:29,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:17:29,364 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:17:29,364 INFO L186 Difference]: Start difference. First operand has 913 places, 6700 transitions, 238977 flow. Second operand 36 states and 2006 transitions. [2022-01-19 09:17:29,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 6984 transitions, 260261 flow [2022-01-19 09:17:48,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 6984 transitions, 255316 flow, removed 160 selfloop flow, removed 18 redundant places. [2022-01-19 09:17:48,838 INFO L242 Difference]: Finished difference. Result has 933 places, 6751 transitions, 244154 flow [2022-01-19 09:17:48,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=233929, PETRI_DIFFERENCE_MINUEND_PLACES=895, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=244154, PETRI_PLACES=933, PETRI_TRANSITIONS=6751} [2022-01-19 09:17:48,843 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 859 predicate places. [2022-01-19 09:17:48,843 INFO L470 AbstractCegarLoop]: Abstraction has has 933 places, 6751 transitions, 244154 flow [2022-01-19 09:17:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:17:48,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:17:48,843 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:17:48,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 09:17:49,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 09:17:49,044 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:17:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:17:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1295981185, now seen corresponding path program 23 times [2022-01-19 09:17:49,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:17:49,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869360057] [2022-01-19 09:17:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:17:49,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:17:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:17:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:17:49,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:17:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869360057] [2022-01-19 09:17:49,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869360057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:17:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936794373] [2022-01-19 09:17:49,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:17:49,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:17:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:17:49,115 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:17:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 09:17:49,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:17:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:17:49,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 09:17:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:17:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:17:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:17:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:17:49,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936794373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:17:49,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:17:49,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 28 [2022-01-19 09:17:49,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210246683] [2022-01-19 09:17:49,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:17:49,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-19 09:17:49,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:17:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-19 09:17:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-19 09:17:49,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:17:49,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 933 places, 6751 transitions, 244154 flow. Second operand has 28 states, 28 states have (on average 53.5) internal successors, (1498), 28 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:17:49,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:17:49,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:17:49,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:18:24,648 INFO L129 PetriNetUnfolder]: 5270/13465 cut-off events. [2022-01-19 09:18:24,648 INFO L130 PetriNetUnfolder]: For 840313/840313 co-relation queries the response was YES. [2022-01-19 09:18:24,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202060 conditions, 13465 events. 5270/13465 cut-off events. For 840313/840313 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 138419 event pairs, 1 based on Foata normal form. 46/13509 useless extension candidates. Maximal degree in co-relation 201759. Up to 2687 conditions per place. [2022-01-19 09:18:25,041 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 2060 selfloop transitions, 5107 changer transitions 319/7527 dead transitions. [2022-01-19 09:18:25,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 983 places, 7527 transitions, 287943 flow [2022-01-19 09:18:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-19 09:18:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-19 09:18:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2815 transitions. [2022-01-19 09:18:25,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.644459706959707 [2022-01-19 09:18:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2815 transitions. [2022-01-19 09:18:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2815 transitions. [2022-01-19 09:18:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:18:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2815 transitions. [2022-01-19 09:18:25,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.13461538461539) internal successors, (2815), 52 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:18:25,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:18:25,049 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:18:25,049 INFO L186 Difference]: Start difference. First operand has 933 places, 6751 transitions, 244154 flow. Second operand 52 states and 2815 transitions. [2022-01-19 09:18:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 983 places, 7527 transitions, 287943 flow [2022-01-19 09:18:44,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 7527 transitions, 282496 flow, removed 104 selfloop flow, removed 22 redundant places. [2022-01-19 09:18:45,221 INFO L242 Difference]: Finished difference. Result has 977 places, 6983 transitions, 262280 flow [2022-01-19 09:18:45,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=238740, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=262280, PETRI_PLACES=977, PETRI_TRANSITIONS=6983} [2022-01-19 09:18:45,224 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 903 predicate places. [2022-01-19 09:18:45,224 INFO L470 AbstractCegarLoop]: Abstraction has has 977 places, 6983 transitions, 262280 flow [2022-01-19 09:18:45,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.5) internal successors, (1498), 28 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:18:45,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:18:45,224 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:18:45,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 09:18:45,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 09:18:45,431 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:18:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:18:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1288057161, now seen corresponding path program 24 times [2022-01-19 09:18:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:18:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105346311] [2022-01-19 09:18:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:18:45,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:18:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:18:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:18:45,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:18:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105346311] [2022-01-19 09:18:45,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105346311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:18:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298050136] [2022-01-19 09:18:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:18:45,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:18:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:18:45,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:18:45,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 09:18:45,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 09:18:45,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:18:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:18:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:18:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:18:45,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:18:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:18:45,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298050136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:18:45,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:18:45,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 09:18:45,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362653790] [2022-01-19 09:18:45,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:18:45,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:18:45,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:18:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:18:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:18:45,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:18:45,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 977 places, 6983 transitions, 262280 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:18:45,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:18:45,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:18:45,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:19:21,902 INFO L129 PetriNetUnfolder]: 5422/13094 cut-off events. [2022-01-19 09:19:21,902 INFO L130 PetriNetUnfolder]: For 895504/895504 co-relation queries the response was YES. [2022-01-19 09:19:22,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212882 conditions, 13094 events. 5422/13094 cut-off events. For 895504/895504 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 128407 event pairs, 86 based on Foata normal form. 44/13061 useless extension candidates. Maximal degree in co-relation 212568. Up to 5691 conditions per place. [2022-01-19 09:19:22,321 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5184 selfloop transitions, 2402 changer transitions 23/7650 dead transitions. [2022-01-19 09:19:22,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 7650 transitions, 305038 flow [2022-01-19 09:19:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 09:19:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 09:19:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3176 transitions. [2022-01-19 09:19:22,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-01-19 09:19:22,324 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3176 transitions. [2022-01-19 09:19:22,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3176 transitions. [2022-01-19 09:19:22,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:19:22,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3176 transitions. [2022-01-19 09:19:22,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.758620689655174) internal successors, (3176), 58 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:19:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:19:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:19:22,329 INFO L186 Difference]: Start difference. First operand has 977 places, 6983 transitions, 262280 flow. Second operand 58 states and 3176 transitions. [2022-01-19 09:19:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 7650 transitions, 305038 flow [2022-01-19 09:19:45,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 7650 transitions, 295141 flow, removed 2456 selfloop flow, removed 39 redundant places. [2022-01-19 09:19:45,536 INFO L242 Difference]: Finished difference. Result has 1005 places, 7456 transitions, 282030 flow [2022-01-19 09:19:45,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=253412, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=282030, PETRI_PLACES=1005, PETRI_TRANSITIONS=7456} [2022-01-19 09:19:45,540 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 931 predicate places. [2022-01-19 09:19:45,540 INFO L470 AbstractCegarLoop]: Abstraction has has 1005 places, 7456 transitions, 282030 flow [2022-01-19 09:19:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:19:45,540 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:19:45,540 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:19:45,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 09:19:45,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:19:45,743 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:19:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:19:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash -783568603, now seen corresponding path program 25 times [2022-01-19 09:19:45,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:19:45,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275838664] [2022-01-19 09:19:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:19:45,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:19:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:19:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:19:45,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:19:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275838664] [2022-01-19 09:19:45,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275838664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:19:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100466355] [2022-01-19 09:19:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:19:45,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:19:45,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:19:45,812 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:19:45,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 09:19:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:19:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:19:45,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:19:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:19:46,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:19:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:19:46,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100466355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:19:46,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:19:46,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 09:19:46,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919034224] [2022-01-19 09:19:46,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:19:46,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 09:19:46,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:19:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 09:19:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-19 09:19:46,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:19:46,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 7456 transitions, 282030 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:19:46,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:19:46,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:19:46,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:20:30,827 INFO L129 PetriNetUnfolder]: 5511/13247 cut-off events. [2022-01-19 09:20:30,827 INFO L130 PetriNetUnfolder]: For 875647/875647 co-relation queries the response was YES. [2022-01-19 09:20:31,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215264 conditions, 13247 events. 5511/13247 cut-off events. For 875647/875647 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 129401 event pairs, 80 based on Foata normal form. 17/13192 useless extension candidates. Maximal degree in co-relation 214948. Up to 6273 conditions per place. [2022-01-19 09:20:31,357 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5617 selfloop transitions, 2042 changer transitions 13/7713 dead transitions. [2022-01-19 09:20:31,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 7713 transitions, 307437 flow [2022-01-19 09:20:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 09:20:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 09:20:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1440 transitions. [2022-01-19 09:20:31,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2022-01-19 09:20:31,359 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1440 transitions. [2022-01-19 09:20:31,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1440 transitions. [2022-01-19 09:20:31,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:20:31,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1440 transitions. [2022-01-19 09:20:31,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.38461538461539) internal successors, (1440), 26 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:20:31,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:20:31,361 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:20:31,361 INFO L186 Difference]: Start difference. First operand has 1005 places, 7456 transitions, 282030 flow. Second operand 26 states and 1440 transitions. [2022-01-19 09:20:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 7713 transitions, 307437 flow [2022-01-19 09:20:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 7713 transitions, 301536 flow, removed 1447 selfloop flow, removed 14 redundant places. [2022-01-19 09:20:55,279 INFO L242 Difference]: Finished difference. Result has 1027 places, 7608 transitions, 290776 flow [2022-01-19 09:20:55,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=275836, PETRI_DIFFERENCE_MINUEND_PLACES=989, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=290776, PETRI_PLACES=1027, PETRI_TRANSITIONS=7608} [2022-01-19 09:20:55,283 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 953 predicate places. [2022-01-19 09:20:55,283 INFO L470 AbstractCegarLoop]: Abstraction has has 1027 places, 7608 transitions, 290776 flow [2022-01-19 09:20:55,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:20:55,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:20:55,284 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:20:55,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 09:20:55,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:20:55,484 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:20:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:20:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1174987093, now seen corresponding path program 26 times [2022-01-19 09:20:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:20:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926395492] [2022-01-19 09:20:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:20:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:20:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:20:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:20:55,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:20:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926395492] [2022-01-19 09:20:55,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926395492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:20:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294541354] [2022-01-19 09:20:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:20:55,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:20:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:20:55,555 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:20:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 09:20:55,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:20:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:20:55,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:20:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:20:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:20:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:20:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:20:55,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294541354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:20:55,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:20:55,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 09:20:55,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562799554] [2022-01-19 09:20:55,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:20:55,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:20:55,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:20:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:20:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:20:55,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:20:55,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 7608 transitions, 290776 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:20:55,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:20:55,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:20:55,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:21:38,062 INFO L129 PetriNetUnfolder]: 5643/13531 cut-off events. [2022-01-19 09:21:38,062 INFO L130 PetriNetUnfolder]: For 918555/918555 co-relation queries the response was YES. [2022-01-19 09:21:38,388 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221008 conditions, 13531 events. 5643/13531 cut-off events. For 918555/918555 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 132180 event pairs, 22 based on Foata normal form. 10/13527 useless extension candidates. Maximal degree in co-relation 220685. Up to 5124 conditions per place. [2022-01-19 09:21:38,510 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4869 selfloop transitions, 2970 changer transitions 17/7897 dead transitions. [2022-01-19 09:21:38,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 7897 transitions, 315389 flow [2022-01-19 09:21:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 09:21:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 09:21:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2210 transitions. [2022-01-19 09:21:38,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6577380952380952 [2022-01-19 09:21:38,512 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2210 transitions. [2022-01-19 09:21:38,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2210 transitions. [2022-01-19 09:21:38,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:21:38,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2210 transitions. [2022-01-19 09:21:38,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.25) internal successors, (2210), 40 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:21:38,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:21:38,518 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:21:38,518 INFO L186 Difference]: Start difference. First operand has 1027 places, 7608 transitions, 290776 flow. Second operand 40 states and 2210 transitions. [2022-01-19 09:21:38,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 7897 transitions, 315389 flow [2022-01-19 09:22:03,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1056 places, 7897 transitions, 314385 flow, removed 468 selfloop flow, removed 9 redundant places. [2022-01-19 09:22:03,712 INFO L242 Difference]: Finished difference. Result has 1070 places, 7780 transitions, 306881 flow [2022-01-19 09:22:03,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=289736, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2808, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=306881, PETRI_PLACES=1070, PETRI_TRANSITIONS=7780} [2022-01-19 09:22:03,716 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 996 predicate places. [2022-01-19 09:22:03,716 INFO L470 AbstractCegarLoop]: Abstraction has has 1070 places, 7780 transitions, 306881 flow [2022-01-19 09:22:03,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:22:03,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:22:03,716 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:22:03,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-19 09:22:03,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-19 09:22:03,917 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:22:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:22:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash 405339259, now seen corresponding path program 27 times [2022-01-19 09:22:03,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:22:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025760704] [2022-01-19 09:22:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:22:03,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:22:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:22:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:22:04,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:22:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025760704] [2022-01-19 09:22:04,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025760704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:22:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29532074] [2022-01-19 09:22:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:22:04,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:22:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:22:04,008 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:22:04,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 09:22:04,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 09:22:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:22:04,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:22:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:22:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:22:04,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:22:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:22:04,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29532074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:22:04,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:22:04,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 09:22:04,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081984567] [2022-01-19 09:22:04,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:22:04,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:22:04,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:22:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:22:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:22:04,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:22:04,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 7780 transitions, 306881 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:22:04,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:22:04,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:22:04,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:22:58,877 INFO L129 PetriNetUnfolder]: 5968/14152 cut-off events. [2022-01-19 09:22:58,878 INFO L130 PetriNetUnfolder]: For 1090524/1090524 co-relation queries the response was YES. [2022-01-19 09:22:59,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241764 conditions, 14152 events. 5968/14152 cut-off events. For 1090524/1090524 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 137543 event pairs, 83 based on Foata normal form. 22/14101 useless extension candidates. Maximal degree in co-relation 241427. Up to 6392 conditions per place. [2022-01-19 09:22:59,514 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5781 selfloop transitions, 2538 changer transitions 4/8364 dead transitions. [2022-01-19 09:22:59,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1115 places, 8364 transitions, 347081 flow [2022-01-19 09:22:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 09:22:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 09:22:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2588 transitions. [2022-01-19 09:22:59,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6555217831813577 [2022-01-19 09:22:59,517 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2588 transitions. [2022-01-19 09:22:59,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2588 transitions. [2022-01-19 09:22:59,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:22:59,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2588 transitions. [2022-01-19 09:22:59,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.06382978723404) internal successors, (2588), 47 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:22:59,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:22:59,523 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:22:59,523 INFO L186 Difference]: Start difference. First operand has 1070 places, 7780 transitions, 306881 flow. Second operand 47 states and 2588 transitions. [2022-01-19 09:22:59,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1115 places, 8364 transitions, 347081 flow [2022-01-19 09:23:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 8364 transitions, 346145 flow, removed 163 selfloop flow, removed 10 redundant places. [2022-01-19 09:23:26,797 INFO L242 Difference]: Finished difference. Result has 1123 places, 8149 transitions, 331071 flow [2022-01-19 09:23:26,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=305897, PETRI_DIFFERENCE_MINUEND_PLACES=1059, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=331071, PETRI_PLACES=1123, PETRI_TRANSITIONS=8149} [2022-01-19 09:23:26,801 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1049 predicate places. [2022-01-19 09:23:26,801 INFO L470 AbstractCegarLoop]: Abstraction has has 1123 places, 8149 transitions, 331071 flow [2022-01-19 09:23:26,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:23:26,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:23:26,801 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:23:26,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-19 09:23:27,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 09:23:27,002 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:23:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:23:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1477223204, now seen corresponding path program 28 times [2022-01-19 09:23:27,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:23:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183154955] [2022-01-19 09:23:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:23:27,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:23:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:23:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:23:27,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:23:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183154955] [2022-01-19 09:23:27,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183154955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:23:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865222509] [2022-01-19 09:23:27,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:23:27,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:23:27,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:23:27,097 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:23:27,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 09:23:27,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:23:27,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:23:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 09:23:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:23:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:23:27,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:23:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:23:27,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865222509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:23:27,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:23:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 31 [2022-01-19 09:23:27,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627097222] [2022-01-19 09:23:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:23:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 09:23:27,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:23:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 09:23:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-01-19 09:23:27,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 09:23:27,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1123 places, 8149 transitions, 331071 flow. Second operand has 31 states, 31 states have (on average 53.74193548387097) internal successors, (1666), 31 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:23:27,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:23:27,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 09:23:27,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:24:54,283 INFO L129 PetriNetUnfolder]: 8558/20630 cut-off events. [2022-01-19 09:24:54,283 INFO L130 PetriNetUnfolder]: For 1719687/1719687 co-relation queries the response was YES. [2022-01-19 09:24:55,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357717 conditions, 20630 events. 8558/20630 cut-off events. For 1719687/1719687 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 216940 event pairs, 1 based on Foata normal form. 211/20840 useless extension candidates. Maximal degree in co-relation 357363. Up to 4561 conditions per place. [2022-01-19 09:24:55,687 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 771 selfloop transitions, 10816 changer transitions 495/12123 dead transitions. [2022-01-19 09:24:55,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1226 places, 12123 transitions, 519755 flow [2022-01-19 09:24:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-19 09:24:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-01-19 09:24:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5653 transitions. [2022-01-19 09:24:55,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6470924908424909 [2022-01-19 09:24:55,691 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5653 transitions. [2022-01-19 09:24:55,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5653 transitions. [2022-01-19 09:24:55,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:24:55,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5653 transitions. [2022-01-19 09:24:55,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 54.35576923076923) internal successors, (5653), 104 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:24:55,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 84.0) internal successors, (8820), 105 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:24:55,702 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 84.0) internal successors, (8820), 105 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:24:55,702 INFO L186 Difference]: Start difference. First operand has 1123 places, 8149 transitions, 331071 flow. Second operand 104 states and 5653 transitions. [2022-01-19 09:24:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1226 places, 12123 transitions, 519755 flow Received shutdown request... [2022-01-19 09:25:25,114 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 09:25:25,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-19 09:25:25,134 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 09:25:25,135 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 09:25:25,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:25:25,315 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 09:25:25,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 09:25:25,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 09:25:25,319 INFO L732 BasicCegarLoop]: Path program histogram: [28, 2, 1, 1, 1] [2022-01-19 09:25:25,321 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 09:25:25,322 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 09:25:25,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 09:25:25 BasicIcfg [2022-01-19 09:25:25,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 09:25:25,324 INFO L158 Benchmark]: Toolchain (without parser) took 820155.33ms. Allocated memory was 371.2MB in the beginning and 6.3GB in the end (delta: 5.9GB). Free memory was 317.3MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2022-01-19 09:25:25,324 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 371.2MB. Free memory is still 334.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 09:25:25,325 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 371.2MB. Free memory was 317.1MB in the beginning and 344.2MB in the end (delta: -27.1MB). Peak memory consumption was 14.3MB. Max. memory is 16.0GB. [2022-01-19 09:25:25,325 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.85ms. Allocated memory is still 371.2MB. Free memory was 344.2MB in the beginning and 342.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 09:25:25,325 INFO L158 Benchmark]: Boogie Preprocessor took 16.18ms. Allocated memory is still 371.2MB. Free memory was 342.4MB in the beginning and 341.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 09:25:25,325 INFO L158 Benchmark]: RCFGBuilder took 312.24ms. Allocated memory is still 371.2MB. Free memory was 341.2MB in the beginning and 330.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-19 09:25:25,326 INFO L158 Benchmark]: TraceAbstraction took 819603.86ms. Allocated memory was 371.2MB in the beginning and 6.3GB in the end (delta: 5.9GB). Free memory was 329.9MB in the beginning and 4.6GB in the end (delta: -4.2GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2022-01-19 09:25:25,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 371.2MB. Free memory is still 334.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 371.2MB. Free memory was 317.1MB in the beginning and 344.2MB in the end (delta: -27.1MB). Peak memory consumption was 14.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.85ms. Allocated memory is still 371.2MB. Free memory was 344.2MB in the beginning and 342.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.18ms. Allocated memory is still 371.2MB. Free memory was 342.4MB in the beginning and 341.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 312.24ms. Allocated memory is still 371.2MB. Free memory was 341.2MB in the beginning and 330.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 819603.86ms. Allocated memory was 371.2MB in the beginning and 6.3GB in the end (delta: 5.9GB). Free memory was 329.9MB in the beginning and 4.6GB in the end (delta: -4.2GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 819.5s, OverallIterations: 33, TraceHistogramMax: 2, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 795.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5535 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5535 mSDsluCounter, 5684 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7140 mSDsCounter, 1718 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17677 IncrementalHoareTripleChecker+Invalid, 19395 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1718 mSolverCounterUnsat, 810 mSDtfsCounter, 17677 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4898 GetRequests, 3369 SyntacticMatches, 39 SemanticMatches, 1490 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24075 ImplicationChecksByTransitivity, 18.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=331071occurred in iteration=32, InterpolantAutomatonStates: 1065, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 15.8s InterpolantComputationTime, 4140 NumberOfCodeBlocks, 4118 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 5802 ConstructedInterpolants, 0 QuantifiedInterpolants, 21248 SizeOfPredicates, 250 NumberOfNonLiveVariables, 4135 ConjunctsInSsa, 382 ConjunctsInUnsatCore, 85 InterpolantComputations, 9 PerfectInterpolantSequences, 214/446 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