/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 19:30:05,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 19:30:05,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 19:30:05,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 19:30:05,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 19:30:05,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 19:30:05,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 19:30:05,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 19:30:05,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 19:30:05,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 19:30:05,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 19:30:05,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 19:30:05,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 19:30:05,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 19:30:05,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 19:30:05,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 19:30:05,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 19:30:05,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 19:30:05,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 19:30:05,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 19:30:05,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 19:30:05,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 19:30:05,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 19:30:05,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 19:30:05,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 19:30:05,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 19:30:05,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 19:30:05,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 19:30:05,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 19:30:05,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 19:30:05,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 19:30:05,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 19:30:05,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 19:30:05,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 19:30:05,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 19:30:05,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 19:30:05,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 19:30:05,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 19:30:05,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 19:30:05,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 19:30:05,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 19:30:05,914 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.epf [2022-12-05 19:30:05,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 19:30:05,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 19:30:05,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 19:30:05,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 19:30:05,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 19:30:05,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 19:30:05,935 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 19:30:05,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 19:30:05,935 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 19:30:05,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 19:30:05,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 19:30:05,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 19:30:05,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 19:30:05,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:30:05,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-05 19:30:05,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 19:30:05,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 19:30:06,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 19:30:06,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 19:30:06,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 19:30:06,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 19:30:06,222 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 19:30:06,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-05 19:30:07,128 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 19:30:07,323 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 19:30:07,324 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-05 19:30:07,330 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6680228e/ce998877cfd14d48823118bae5d8ca60/FLAGc63422476 [2022-12-05 19:30:07,346 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6680228e/ce998877cfd14d48823118bae5d8ca60 [2022-12-05 19:30:07,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 19:30:07,350 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 19:30:07,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 19:30:07,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 19:30:07,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 19:30:07,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3913cad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07, skipping insertion in model container [2022-12-05 19:30:07,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 19:30:07,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 19:30:07,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:30:07,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:30:07,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:30:07,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:30:07,503 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-05 19:30:07,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:30:07,512 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 19:30:07,523 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:30:07,523 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:30:07,523 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 19:30:07,524 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 19:30:07,540 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-05 19:30:07,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 19:30:07,552 INFO L208 MainTranslator]: Completed translation [2022-12-05 19:30:07,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07 WrapperNode [2022-12-05 19:30:07,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 19:30:07,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 19:30:07,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 19:30:07,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 19:30:07,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,580 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-12-05 19:30:07,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 19:30:07,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 19:30:07,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 19:30:07,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 19:30:07,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 19:30:07,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 19:30:07,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 19:30:07,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 19:30:07,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (1/1) ... [2022-12-05 19:30:07,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 19:30:07,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:07,644 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) [2022-12-05 19:30:07,664 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 [2022-12-05 19:30:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 19:30:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 19:30:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 19:30:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 19:30:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 19:30:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 19:30:07,679 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 19:30:07,762 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 19:30:07,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 19:30:07,917 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 19:30:07,959 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 19:30:07,960 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 19:30:07,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:30:07 BoogieIcfgContainer [2022-12-05 19:30:07,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 19:30:07,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 19:30:07,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 19:30:07,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 19:30:07,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 07:30:07" (1/3) ... [2022-12-05 19:30:07,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fca344f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:30:07, skipping insertion in model container [2022-12-05 19:30:07,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 07:30:07" (2/3) ... [2022-12-05 19:30:07,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fca344f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 07:30:07, skipping insertion in model container [2022-12-05 19:30:07,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 07:30:07" (3/3) ... [2022-12-05 19:30:07,967 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-05 19:30:07,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 19:30:07,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 19:30:07,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 19:30:08,065 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 19:30:08,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2022-12-05 19:30:08,164 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-12-05 19:30:08,164 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:30:08,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-05 19:30:08,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2022-12-05 19:30:08,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2022-12-05 19:30:08,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 19:30:08,180 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b2756a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 19:30:08,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 19:30:08,209 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2022-12-05 19:30:08,209 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 19:30:08,209 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:08,210 INFO L213 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] [2022-12-05 19:30:08,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1972558308, now seen corresponding path program 1 times [2022-12-05 19:30:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:08,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984508385] [2022-12-05 19:30:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984508385] [2022-12-05 19:30:08,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984508385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:30:08,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:30:08,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 19:30:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087571716] [2022-12-05 19:30:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:30:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:30:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:30:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-05 19:30:08,798 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 77 [2022-12-05 19:30:08,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 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) [2022-12-05 19:30:08,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:08,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 77 [2022-12-05 19:30:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:08,965 INFO L130 PetriNetUnfolder]: 52/167 cut-off events. [2022-12-05 19:30:08,965 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-05 19:30:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 167 events. 52/167 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 474 event pairs, 20 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 217. Up to 70 conditions per place. [2022-12-05 19:30:08,968 INFO L137 encePairwiseOnDemand]: 67/77 looper letters, 24 selfloop transitions, 5 changer transitions 2/70 dead transitions. [2022-12-05 19:30:08,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 217 flow [2022-12-05 19:30:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 19:30:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 19:30:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 326 transitions. [2022-12-05 19:30:08,985 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7056277056277056 [2022-12-05 19:30:08,986 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 6 states and 326 transitions. [2022-12-05 19:30:08,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 217 flow [2022-12-05 19:30:08,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:30:08,991 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 144 flow [2022-12-05 19:30:08,992 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2022-12-05 19:30:08,994 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2022-12-05 19:30:08,994 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 144 flow [2022-12-05 19:30:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 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) [2022-12-05 19:30:08,995 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:08,995 INFO L213 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] [2022-12-05 19:30:08,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 19:30:08,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 856991610, now seen corresponding path program 1 times [2022-12-05 19:30:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277935149] [2022-12-05 19:30:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:09,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277935149] [2022-12-05 19:30:09,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277935149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:30:09,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 19:30:09,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 19:30:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343508999] [2022-12-05 19:30:09,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:30:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 19:30:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 19:30:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 19:30:09,132 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 77 [2022-12-05 19:30:09,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 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) [2022-12-05 19:30:09,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:09,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 77 [2022-12-05 19:30:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:09,238 INFO L130 PetriNetUnfolder]: 69/238 cut-off events. [2022-12-05 19:30:09,241 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-12-05 19:30:09,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 238 events. 69/238 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 899 event pairs, 31 based on Foata normal form. 3/218 useless extension candidates. Maximal degree in co-relation 292. Up to 93 conditions per place. [2022-12-05 19:30:09,244 INFO L137 encePairwiseOnDemand]: 70/77 looper letters, 28 selfloop transitions, 5 changer transitions 1/79 dead transitions. [2022-12-05 19:30:09,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 79 transitions, 269 flow [2022-12-05 19:30:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 19:30:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 19:30:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-12-05 19:30:09,247 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-12-05 19:30:09,247 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 144 flow. Second operand 6 states and 369 transitions. [2022-12-05 19:30:09,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 79 transitions, 269 flow [2022-12-05 19:30:09,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 257 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 19:30:09,250 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 164 flow [2022-12-05 19:30:09,251 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2022-12-05 19:30:09,251 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2022-12-05 19:30:09,251 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 164 flow [2022-12-05 19:30:09,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 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) [2022-12-05 19:30:09,252 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:09,252 INFO L213 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] [2022-12-05 19:30:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 19:30:09,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -798754498, now seen corresponding path program 2 times [2022-12-05 19:30:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:09,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551934705] [2022-12-05 19:30:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:09,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551934705] [2022-12-05 19:30:09,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551934705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:09,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936117117] [2022-12-05 19:30:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:30:09,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:09,402 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) [2022-12-05 19:30:09,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 19:30:09,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 19:30:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:09,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 19:30:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:30:09,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 19:30:09,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936117117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 19:30:09,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 19:30:09,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-12-05 19:30:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578956135] [2022-12-05 19:30:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 19:30:09,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 19:30:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 19:30:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-05 19:30:09,780 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-12-05 19:30:09,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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) [2022-12-05 19:30:09,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:09,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-12-05 19:30:09,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:09,897 INFO L130 PetriNetUnfolder]: 30/136 cut-off events. [2022-12-05 19:30:09,897 INFO L131 PetriNetUnfolder]: For 85/97 co-relation queries the response was YES. [2022-12-05 19:30:09,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 136 events. 30/136 cut-off events. For 85/97 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 392 event pairs, 13 based on Foata normal form. 11/141 useless extension candidates. Maximal degree in co-relation 156. Up to 46 conditions per place. [2022-12-05 19:30:09,901 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 18 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2022-12-05 19:30:09,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 223 flow [2022-12-05 19:30:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 19:30:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 19:30:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 426 transitions. [2022-12-05 19:30:09,904 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6915584415584416 [2022-12-05 19:30:09,904 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 164 flow. Second operand 8 states and 426 transitions. [2022-12-05 19:30:09,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 223 flow [2022-12-05 19:30:09,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 207 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-05 19:30:09,907 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 160 flow [2022-12-05 19:30:09,907 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=160, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2022-12-05 19:30:09,908 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-12-05 19:30:09,908 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 160 flow [2022-12-05 19:30:09,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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) [2022-12-05 19:30:09,909 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:09,909 INFO L213 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] [2022-12-05 19:30:09,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:10,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1840617665, now seen corresponding path program 1 times [2022-12-05 19:30:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049993962] [2022-12-05 19:30:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049993962] [2022-12-05 19:30:10,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049993962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067637563] [2022-12-05 19:30:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:10,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:10,416 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) [2022-12-05 19:30:10,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 19:30:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 19:30:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:10,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067637563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:10,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:10,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 16 [2022-12-05 19:30:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586358718] [2022-12-05 19:30:10,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 19:30:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 19:30:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-05 19:30:10,811 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 77 [2022-12-05 19:30:10,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 160 flow. Second operand has 16 states, 16 states have (on average 46.6875) internal successors, (747), 16 states have internal predecessors, (747), 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) [2022-12-05 19:30:10,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:10,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 77 [2022-12-05 19:30:10,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:11,239 INFO L130 PetriNetUnfolder]: 214/618 cut-off events. [2022-12-05 19:30:11,239 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-05 19:30:11,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 618 events. 214/618 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3328 event pairs, 18 based on Foata normal form. 2/618 useless extension candidates. Maximal degree in co-relation 546. Up to 121 conditions per place. [2022-12-05 19:30:11,244 INFO L137 encePairwiseOnDemand]: 63/77 looper letters, 95 selfloop transitions, 41 changer transitions 20/190 dead transitions. [2022-12-05 19:30:11,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 190 transitions, 898 flow [2022-12-05 19:30:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 19:30:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 19:30:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1092 transitions. [2022-12-05 19:30:11,247 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6446280991735537 [2022-12-05 19:30:11,247 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 160 flow. Second operand 22 states and 1092 transitions. [2022-12-05 19:30:11,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 190 transitions, 898 flow [2022-12-05 19:30:11,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 190 transitions, 843 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 19:30:11,255 INFO L231 Difference]: Finished difference. Result has 102 places, 107 transitions, 484 flow [2022-12-05 19:30:11,255 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=484, PETRI_PLACES=102, PETRI_TRANSITIONS=107} [2022-12-05 19:30:11,257 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 34 predicate places. [2022-12-05 19:30:11,257 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 107 transitions, 484 flow [2022-12-05 19:30:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 46.6875) internal successors, (747), 16 states have internal predecessors, (747), 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) [2022-12-05 19:30:11,258 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:11,258 INFO L213 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] [2022-12-05 19:30:11,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:11,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-05 19:30:11,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -86687591, now seen corresponding path program 2 times [2022-12-05 19:30:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588222679] [2022-12-05 19:30:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:11,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:30:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:11,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588222679] [2022-12-05 19:30:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588222679] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062282882] [2022-12-05 19:30:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:30:11,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:11,572 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) [2022-12-05 19:30:11,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 19:30:11,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:30:11,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 19:30:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:30:11,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:30:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062282882] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:11,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:11,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-12-05 19:30:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918546310] [2022-12-05 19:30:11,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 19:30:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 19:30:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-05 19:30:11,806 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 77 [2022-12-05 19:30:11,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 107 transitions, 484 flow. Second operand has 11 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 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) [2022-12-05 19:30:11,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:11,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 77 [2022-12-05 19:30:11,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:11,922 INFO L130 PetriNetUnfolder]: 190/603 cut-off events. [2022-12-05 19:30:11,922 INFO L131 PetriNetUnfolder]: For 835/844 co-relation queries the response was YES. [2022-12-05 19:30:11,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 603 events. 190/603 cut-off events. For 835/844 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3448 event pairs, 28 based on Foata normal form. 15/606 useless extension candidates. Maximal degree in co-relation 1692. Up to 192 conditions per place. [2022-12-05 19:30:11,926 INFO L137 encePairwiseOnDemand]: 70/77 looper letters, 55 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2022-12-05 19:30:11,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 141 transitions, 859 flow [2022-12-05 19:30:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 19:30:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 19:30:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 431 transitions. [2022-12-05 19:30:11,927 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7996289424860853 [2022-12-05 19:30:11,927 INFO L175 Difference]: Start difference. First operand has 102 places, 107 transitions, 484 flow. Second operand 7 states and 431 transitions. [2022-12-05 19:30:11,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 141 transitions, 859 flow [2022-12-05 19:30:11,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 141 transitions, 843 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-05 19:30:11,935 INFO L231 Difference]: Finished difference. Result has 104 places, 123 transitions, 730 flow [2022-12-05 19:30:11,936 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=104, PETRI_TRANSITIONS=123} [2022-12-05 19:30:11,937 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-12-05 19:30:11,937 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 123 transitions, 730 flow [2022-12-05 19:30:11,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 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) [2022-12-05 19:30:11,938 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:11,938 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:11,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:12,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -33346371, now seen corresponding path program 3 times [2022-12-05 19:30:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130522419] [2022-12-05 19:30:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130522419] [2022-12-05 19:30:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130522419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973195453] [2022-12-05 19:30:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:30:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:12,417 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) [2022-12-05 19:30:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 19:30:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 19:30:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-05 19:30:12,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:12,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973195453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:12,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:12,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-12-05 19:30:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687647736] [2022-12-05 19:30:12,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 19:30:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 19:30:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-05 19:30:12,739 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-05 19:30:12,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 123 transitions, 730 flow. Second operand has 20 states, 20 states have (on average 46.8) internal successors, (936), 20 states have internal predecessors, (936), 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) [2022-12-05 19:30:12,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:12,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-05 19:30:12,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:13,941 INFO L130 PetriNetUnfolder]: 427/1079 cut-off events. [2022-12-05 19:30:13,941 INFO L131 PetriNetUnfolder]: For 3351/3351 co-relation queries the response was YES. [2022-12-05 19:30:13,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 1079 events. 427/1079 cut-off events. For 3351/3351 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6321 event pairs, 1 based on Foata normal form. 24/1103 useless extension candidates. Maximal degree in co-relation 3765. Up to 198 conditions per place. [2022-12-05 19:30:13,947 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 142 selfloop transitions, 220 changer transitions 5/402 dead transitions. [2022-12-05 19:30:13,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 402 transitions, 3834 flow [2022-12-05 19:30:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 19:30:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 19:30:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1897 transitions. [2022-12-05 19:30:13,951 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6317016317016317 [2022-12-05 19:30:13,951 INFO L175 Difference]: Start difference. First operand has 104 places, 123 transitions, 730 flow. Second operand 39 states and 1897 transitions. [2022-12-05 19:30:13,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 402 transitions, 3834 flow [2022-12-05 19:30:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 402 transitions, 3772 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-12-05 19:30:13,971 INFO L231 Difference]: Finished difference. Result has 167 places, 306 transitions, 3179 flow [2022-12-05 19:30:13,972 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3179, PETRI_PLACES=167, PETRI_TRANSITIONS=306} [2022-12-05 19:30:13,974 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 99 predicate places. [2022-12-05 19:30:13,975 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 306 transitions, 3179 flow [2022-12-05 19:30:13,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 46.8) internal successors, (936), 20 states have internal predecessors, (936), 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) [2022-12-05 19:30:13,976 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:13,976 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:13,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:14,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:14,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1774312899, now seen corresponding path program 4 times [2022-12-05 19:30:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:14,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42563147] [2022-12-05 19:30:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42563147] [2022-12-05 19:30:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42563147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924083167] [2022-12-05 19:30:14,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:30:14,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:14,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:14,345 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) [2022-12-05 19:30:14,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 19:30:14,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:30:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:14,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:14,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:14,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924083167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:14,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:14,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-12-05 19:30:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655963628] [2022-12-05 19:30:14,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:14,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:30:14,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:30:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:30:14,734 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:14,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 306 transitions, 3179 flow. Second operand has 19 states, 19 states have (on average 57.10526315789474) internal successors, (1085), 19 states have internal predecessors, (1085), 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) [2022-12-05 19:30:14,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:14,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:15,853 INFO L130 PetriNetUnfolder]: 657/1733 cut-off events. [2022-12-05 19:30:15,854 INFO L131 PetriNetUnfolder]: For 18002/18003 co-relation queries the response was YES. [2022-12-05 19:30:15,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 1733 events. 657/1733 cut-off events. For 18002/18003 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12021 event pairs, 13 based on Foata normal form. 7/1735 useless extension candidates. Maximal degree in co-relation 8564. Up to 346 conditions per place. [2022-12-05 19:30:15,868 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 208 selfloop transitions, 340 changer transitions 54/662 dead transitions. [2022-12-05 19:30:15,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 662 transitions, 8989 flow [2022-12-05 19:30:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-05 19:30:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-05 19:30:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2664 transitions. [2022-12-05 19:30:15,872 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7688311688311689 [2022-12-05 19:30:15,872 INFO L175 Difference]: Start difference. First operand has 167 places, 306 transitions, 3179 flow. Second operand 45 states and 2664 transitions. [2022-12-05 19:30:15,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 662 transitions, 8989 flow [2022-12-05 19:30:15,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 662 transitions, 8610 flow, removed 123 selfloop flow, removed 5 redundant places. [2022-12-05 19:30:15,933 INFO L231 Difference]: Finished difference. Result has 228 places, 531 transitions, 7081 flow [2022-12-05 19:30:15,934 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7081, PETRI_PLACES=228, PETRI_TRANSITIONS=531} [2022-12-05 19:30:15,934 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 160 predicate places. [2022-12-05 19:30:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 531 transitions, 7081 flow [2022-12-05 19:30:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.10526315789474) internal successors, (1085), 19 states have internal predecessors, (1085), 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) [2022-12-05 19:30:15,935 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:15,935 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:15,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:16,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2081451041, now seen corresponding path program 5 times [2022-12-05 19:30:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:16,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931123597] [2022-12-05 19:30:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:16,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931123597] [2022-12-05 19:30:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931123597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964923050] [2022-12-05 19:30:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:30:16,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:16,344 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) [2022-12-05 19:30:16,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 19:30:16,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 19:30:16,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:16,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:16,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964923050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:16,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:16,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-05 19:30:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977860893] [2022-12-05 19:30:16,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 19:30:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 19:30:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-05 19:30:16,769 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:16,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 531 transitions, 7081 flow. Second operand has 20 states, 20 states have (on average 57.3) internal successors, (1146), 20 states have internal predecessors, (1146), 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) [2022-12-05 19:30:16,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:16,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:16,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:18,126 INFO L130 PetriNetUnfolder]: 767/1960 cut-off events. [2022-12-05 19:30:18,126 INFO L131 PetriNetUnfolder]: For 35306/35309 co-relation queries the response was YES. [2022-12-05 19:30:18,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12174 conditions, 1960 events. 767/1960 cut-off events. For 35306/35309 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13536 event pairs, 12 based on Foata normal form. 27/1977 useless extension candidates. Maximal degree in co-relation 12075. Up to 432 conditions per place. [2022-12-05 19:30:18,147 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 152 selfloop transitions, 612 changer transitions 6/830 dead transitions. [2022-12-05 19:30:18,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 830 transitions, 13715 flow [2022-12-05 19:30:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-05 19:30:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-05 19:30:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2710 transitions. [2022-12-05 19:30:18,151 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-12-05 19:30:18,151 INFO L175 Difference]: Start difference. First operand has 228 places, 531 transitions, 7081 flow. Second operand 46 states and 2710 transitions. [2022-12-05 19:30:18,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 830 transitions, 13715 flow [2022-12-05 19:30:18,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 830 transitions, 13058 flow, removed 318 selfloop flow, removed 3 redundant places. [2022-12-05 19:30:18,283 INFO L231 Difference]: Finished difference. Result has 283 places, 728 transitions, 11302 flow [2022-12-05 19:30:18,284 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=11302, PETRI_PLACES=283, PETRI_TRANSITIONS=728} [2022-12-05 19:30:18,284 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 215 predicate places. [2022-12-05 19:30:18,284 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 728 transitions, 11302 flow [2022-12-05 19:30:18,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.3) internal successors, (1146), 20 states have internal predecessors, (1146), 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) [2022-12-05 19:30:18,285 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:18,285 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:18,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:18,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:18,491 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 121694667, now seen corresponding path program 6 times [2022-12-05 19:30:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157690934] [2022-12-05 19:30:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157690934] [2022-12-05 19:30:18,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157690934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241709920] [2022-12-05 19:30:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:30:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:18,687 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) [2022-12-05 19:30:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 19:30:18,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 19:30:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:18,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:19,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241709920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:19,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:19,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 19:30:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206671226] [2022-12-05 19:30:19,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:30:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:30:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:30:19,063 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:19,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 728 transitions, 11302 flow. Second operand has 18 states, 18 states have (on average 57.111111111111114) internal successors, (1028), 18 states have internal predecessors, (1028), 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) [2022-12-05 19:30:19,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:19,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:19,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:21,548 INFO L130 PetriNetUnfolder]: 989/2809 cut-off events. [2022-12-05 19:30:21,548 INFO L131 PetriNetUnfolder]: For 57664/57665 co-relation queries the response was YES. [2022-12-05 19:30:21,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 2809 events. 989/2809 cut-off events. For 57664/57665 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22771 event pairs, 27 based on Foata normal form. 17/2813 useless extension candidates. Maximal degree in co-relation 18328. Up to 530 conditions per place. [2022-12-05 19:30:21,581 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 278 selfloop transitions, 796 changer transitions 4/1138 dead transitions. [2022-12-05 19:30:21,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1138 transitions, 20711 flow [2022-12-05 19:30:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-05 19:30:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-05 19:30:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4008 transitions. [2022-12-05 19:30:21,586 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7654698242933538 [2022-12-05 19:30:21,586 INFO L175 Difference]: Start difference. First operand has 283 places, 728 transitions, 11302 flow. Second operand 68 states and 4008 transitions. [2022-12-05 19:30:21,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1138 transitions, 20711 flow [2022-12-05 19:30:21,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1138 transitions, 20289 flow, removed 204 selfloop flow, removed 3 redundant places. [2022-12-05 19:30:21,839 INFO L231 Difference]: Finished difference. Result has 368 places, 994 transitions, 18497 flow [2022-12-05 19:30:21,839 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=11084, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=18497, PETRI_PLACES=368, PETRI_TRANSITIONS=994} [2022-12-05 19:30:21,840 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 300 predicate places. [2022-12-05 19:30:21,840 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 994 transitions, 18497 flow [2022-12-05 19:30:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.111111111111114) internal successors, (1028), 18 states have internal predecessors, (1028), 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) [2022-12-05 19:30:21,840 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:21,840 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:21,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 19:30:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:22,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1522855839, now seen corresponding path program 7 times [2022-12-05 19:30:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803323339] [2022-12-05 19:30:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:22,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:22,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803323339] [2022-12-05 19:30:22,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803323339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:22,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518166453] [2022-12-05 19:30:22,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:30:22,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:22,239 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) [2022-12-05 19:30:22,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 19:30:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:22,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:22,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518166453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:22,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:22,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 19:30:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512748988] [2022-12-05 19:30:22,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:30:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:30:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:30:22,585 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:22,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 994 transitions, 18497 flow. Second operand has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:30:22,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:22,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:22,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:23,842 INFO L130 PetriNetUnfolder]: 1132/3216 cut-off events. [2022-12-05 19:30:23,843 INFO L131 PetriNetUnfolder]: For 83933/83934 co-relation queries the response was YES. [2022-12-05 19:30:23,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24074 conditions, 3216 events. 1132/3216 cut-off events. For 83933/83934 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26876 event pairs, 55 based on Foata normal form. 3/3213 useless extension candidates. Maximal degree in co-relation 23631. Up to 656 conditions per place. [2022-12-05 19:30:23,884 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 414 selfloop transitions, 729 changer transitions 7/1210 dead transitions. [2022-12-05 19:30:23,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1210 transitions, 25290 flow [2022-12-05 19:30:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 19:30:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 19:30:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1297 transitions. [2022-12-05 19:30:23,886 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7656434474616293 [2022-12-05 19:30:23,886 INFO L175 Difference]: Start difference. First operand has 368 places, 994 transitions, 18497 flow. Second operand 22 states and 1297 transitions. [2022-12-05 19:30:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1210 transitions, 25290 flow [2022-12-05 19:30:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1210 transitions, 24229 flow, removed 302 selfloop flow, removed 18 redundant places. [2022-12-05 19:30:24,432 INFO L231 Difference]: Finished difference. Result has 382 places, 1157 transitions, 24025 flow [2022-12-05 19:30:24,433 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=17561, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24025, PETRI_PLACES=382, PETRI_TRANSITIONS=1157} [2022-12-05 19:30:24,433 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 314 predicate places. [2022-12-05 19:30:24,433 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1157 transitions, 24025 flow [2022-12-05 19:30:24,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:30:24,434 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:24,434 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:24,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:24,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-05 19:30:24,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1903843399, now seen corresponding path program 8 times [2022-12-05 19:30:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:24,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857013418] [2022-12-05 19:30:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:24,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:24,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857013418] [2022-12-05 19:30:24,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857013418] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:24,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346994176] [2022-12-05 19:30:24,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:30:24,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:24,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:24,819 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) [2022-12-05 19:30:24,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 19:30:24,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:30:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:24,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:25,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346994176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:25,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:25,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-05 19:30:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434932578] [2022-12-05 19:30:25,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:30:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:30:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:30:25,117 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:25,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1157 transitions, 24025 flow. Second operand has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 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) [2022-12-05 19:30:25,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:25,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:26,781 INFO L130 PetriNetUnfolder]: 1353/3787 cut-off events. [2022-12-05 19:30:26,781 INFO L131 PetriNetUnfolder]: For 110056/110066 co-relation queries the response was YES. [2022-12-05 19:30:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30230 conditions, 3787 events. 1353/3787 cut-off events. For 110056/110066 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32329 event pairs, 18 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 29691. Up to 858 conditions per place. [2022-12-05 19:30:26,825 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 494 selfloop transitions, 949 changer transitions 8/1511 dead transitions. [2022-12-05 19:30:26,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1511 transitions, 35274 flow [2022-12-05 19:30:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 19:30:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 19:30:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1763 transitions. [2022-12-05 19:30:26,827 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7632034632034632 [2022-12-05 19:30:26,827 INFO L175 Difference]: Start difference. First operand has 382 places, 1157 transitions, 24025 flow. Second operand 30 states and 1763 transitions. [2022-12-05 19:30:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1511 transitions, 35274 flow [2022-12-05 19:30:27,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1511 transitions, 34713 flow, removed 259 selfloop flow, removed 5 redundant places. [2022-12-05 19:30:27,639 INFO L231 Difference]: Finished difference. Result has 419 places, 1470 transitions, 34780 flow [2022-12-05 19:30:27,640 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23724, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=34780, PETRI_PLACES=419, PETRI_TRANSITIONS=1470} [2022-12-05 19:30:27,641 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 351 predicate places. [2022-12-05 19:30:27,641 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1470 transitions, 34780 flow [2022-12-05 19:30:27,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 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) [2022-12-05 19:30:27,641 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:27,641 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:27,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 19:30:27,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:27,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:27,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2124611933, now seen corresponding path program 9 times [2022-12-05 19:30:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:27,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625703365] [2022-12-05 19:30:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:27,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:28,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625703365] [2022-12-05 19:30:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625703365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317809608] [2022-12-05 19:30:28,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:30:28,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:28,058 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) [2022-12-05 19:30:28,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 19:30:28,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 19:30:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:28,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317809608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:28,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 19:30:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105557240] [2022-12-05 19:30:28,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:28,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:30:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:30:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:30:28,376 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:28,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1470 transitions, 34780 flow. Second operand has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:30:28,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:28,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:28,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:31,966 INFO L130 PetriNetUnfolder]: 1680/4666 cut-off events. [2022-12-05 19:30:31,966 INFO L131 PetriNetUnfolder]: For 158003/158009 co-relation queries the response was YES. [2022-12-05 19:30:31,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42309 conditions, 4666 events. 1680/4666 cut-off events. For 158003/158009 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41718 event pairs, 51 based on Foata normal form. 10/4670 useless extension candidates. Maximal degree in co-relation 41178. Up to 997 conditions per place. [2022-12-05 19:30:32,023 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 178 selfloop transitions, 1681 changer transitions 13/1932 dead transitions. [2022-12-05 19:30:32,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1932 transitions, 50298 flow [2022-12-05 19:30:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-05 19:30:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-05 19:30:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3339 transitions. [2022-12-05 19:30:32,026 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7607655502392344 [2022-12-05 19:30:32,026 INFO L175 Difference]: Start difference. First operand has 419 places, 1470 transitions, 34780 flow. Second operand 57 states and 3339 transitions. [2022-12-05 19:30:32,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1932 transitions, 50298 flow [2022-12-05 19:30:33,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1932 transitions, 49627 flow, removed 327 selfloop flow, removed 3 redundant places. [2022-12-05 19:30:33,470 INFO L231 Difference]: Finished difference. Result has 492 places, 1888 transitions, 51005 flow [2022-12-05 19:30:33,471 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=34397, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=51005, PETRI_PLACES=492, PETRI_TRANSITIONS=1888} [2022-12-05 19:30:33,472 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 424 predicate places. [2022-12-05 19:30:33,472 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1888 transitions, 51005 flow [2022-12-05 19:30:33,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:30:33,473 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:33,473 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:33,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:33,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-05 19:30:33,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2039976549, now seen corresponding path program 10 times [2022-12-05 19:30:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:33,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211323132] [2022-12-05 19:30:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:33,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:33,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211323132] [2022-12-05 19:30:33,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211323132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:33,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141928715] [2022-12-05 19:30:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:30:33,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:33,839 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) [2022-12-05 19:30:33,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 19:30:33,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:30:33,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:33,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:34,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141928715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:34,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:34,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-05 19:30:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784255704] [2022-12-05 19:30:34,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:30:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:30:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:30:34,164 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:34,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1888 transitions, 51005 flow. Second operand has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 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) [2022-12-05 19:30:34,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:34,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:34,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:38,609 INFO L130 PetriNetUnfolder]: 1847/5070 cut-off events. [2022-12-05 19:30:38,610 INFO L131 PetriNetUnfolder]: For 195675/195686 co-relation queries the response was YES. [2022-12-05 19:30:38,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51910 conditions, 5070 events. 1847/5070 cut-off events. For 195675/195686 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 45859 event pairs, 36 based on Foata normal form. 9/5075 useless extension candidates. Maximal degree in co-relation 51405. Up to 1038 conditions per place. [2022-12-05 19:30:38,752 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 181 selfloop transitions, 1923 changer transitions 7/2171 dead transitions. [2022-12-05 19:30:38,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2171 transitions, 63704 flow [2022-12-05 19:30:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-05 19:30:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-05 19:30:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3776 transitions. [2022-12-05 19:30:38,755 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7544455544455545 [2022-12-05 19:30:38,755 INFO L175 Difference]: Start difference. First operand has 492 places, 1888 transitions, 51005 flow. Second operand 65 states and 3776 transitions. [2022-12-05 19:30:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2171 transitions, 63704 flow [2022-12-05 19:30:41,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2171 transitions, 59904 flow, removed 1131 selfloop flow, removed 27 redundant places. [2022-12-05 19:30:41,292 INFO L231 Difference]: Finished difference. Result has 536 places, 2132 transitions, 60151 flow [2022-12-05 19:30:41,294 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=48094, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=60151, PETRI_PLACES=536, PETRI_TRANSITIONS=2132} [2022-12-05 19:30:41,294 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 468 predicate places. [2022-12-05 19:30:41,294 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 2132 transitions, 60151 flow [2022-12-05 19:30:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 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) [2022-12-05 19:30:41,295 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:41,295 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:41,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-05 19:30:41,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-05 19:30:41,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2097734907, now seen corresponding path program 11 times [2022-12-05 19:30:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:41,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372404564] [2022-12-05 19:30:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372404564] [2022-12-05 19:30:41,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372404564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:41,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205043168] [2022-12-05 19:30:41,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:30:41,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:41,648 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) [2022-12-05 19:30:41,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 19:30:41,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:30:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 19:30:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205043168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:42,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:42,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-12-05 19:30:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498621474] [2022-12-05 19:30:42,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 19:30:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 19:30:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-12-05 19:30:42,078 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:42,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 2132 transitions, 60151 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 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) [2022-12-05 19:30:42,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:42,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:48,662 INFO L130 PetriNetUnfolder]: 2303/6509 cut-off events. [2022-12-05 19:30:48,662 INFO L131 PetriNetUnfolder]: For 211471/211494 co-relation queries the response was YES. [2022-12-05 19:30:48,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66635 conditions, 6509 events. 2303/6509 cut-off events. For 211471/211494 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 63412 event pairs, 23 based on Foata normal form. 109/6598 useless extension candidates. Maximal degree in co-relation 66368. Up to 1345 conditions per place. [2022-12-05 19:30:48,746 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 315 selfloop transitions, 2423 changer transitions 5/2803 dead transitions. [2022-12-05 19:30:48,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 2803 transitions, 85014 flow [2022-12-05 19:30:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-05 19:30:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-05 19:30:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4903 transitions. [2022-12-05 19:30:48,750 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7580395794681509 [2022-12-05 19:30:48,750 INFO L175 Difference]: Start difference. First operand has 536 places, 2132 transitions, 60151 flow. Second operand 84 states and 4903 transitions. [2022-12-05 19:30:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 2803 transitions, 85014 flow [2022-12-05 19:30:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2803 transitions, 81117 flow, removed 307 selfloop flow, removed 36 redundant places. [2022-12-05 19:30:51,611 INFO L231 Difference]: Finished difference. Result has 589 places, 2714 transitions, 80855 flow [2022-12-05 19:30:51,612 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=56038, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=80855, PETRI_PLACES=589, PETRI_TRANSITIONS=2714} [2022-12-05 19:30:51,613 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 521 predicate places. [2022-12-05 19:30:51,613 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 2714 transitions, 80855 flow [2022-12-05 19:30:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 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) [2022-12-05 19:30:51,613 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:30:51,613 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:30:51,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 19:30:51,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 19:30:51,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:30:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:30:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1774079327, now seen corresponding path program 12 times [2022-12-05 19:30:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:30:51,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446668858] [2022-12-05 19:30:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:30:51,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:30:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:30:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:30:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446668858] [2022-12-05 19:30:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446668858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:30:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118660698] [2022-12-05 19:30:52,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:30:52,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:30:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:30:52,003 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) [2022-12-05 19:30:52,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 19:30:52,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 19:30:52,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:30:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:30:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:30:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:52,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:30:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:30:52,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118660698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:30:52,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:30:52,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-05 19:30:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260778838] [2022-12-05 19:30:52,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:30:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 19:30:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:30:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 19:30:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-05 19:30:52,366 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:30:52,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 2714 transitions, 80855 flow. Second operand has 20 states, 20 states have (on average 57.3) internal successors, (1146), 20 states have internal predecessors, (1146), 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) [2022-12-05 19:30:52,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:30:52,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:30:52,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:30:57,627 INFO L130 PetriNetUnfolder]: 2442/6912 cut-off events. [2022-12-05 19:30:57,628 INFO L131 PetriNetUnfolder]: For 223363/223403 co-relation queries the response was YES. [2022-12-05 19:30:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72924 conditions, 6912 events. 2442/6912 cut-off events. For 223363/223403 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 68058 event pairs, 35 based on Foata normal form. 32/6924 useless extension candidates. Maximal degree in co-relation 72178. Up to 1484 conditions per place. [2022-12-05 19:30:57,725 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 377 selfloop transitions, 2490 changer transitions 8/2935 dead transitions. [2022-12-05 19:30:57,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 2935 transitions, 93208 flow [2022-12-05 19:30:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-05 19:30:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-05 19:30:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3099 transitions. [2022-12-05 19:30:57,728 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7593727027689292 [2022-12-05 19:30:57,728 INFO L175 Difference]: Start difference. First operand has 589 places, 2714 transitions, 80855 flow. Second operand 53 states and 3099 transitions. [2022-12-05 19:30:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 2935 transitions, 93208 flow [2022-12-05 19:31:00,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2935 transitions, 91335 flow, removed 605 selfloop flow, removed 21 redundant places. [2022-12-05 19:31:01,022 INFO L231 Difference]: Finished difference. Result has 619 places, 2869 transitions, 89950 flow [2022-12-05 19:31:01,024 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=78634, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=89950, PETRI_PLACES=619, PETRI_TRANSITIONS=2869} [2022-12-05 19:31:01,025 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 551 predicate places. [2022-12-05 19:31:01,025 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 2869 transitions, 89950 flow [2022-12-05 19:31:01,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.3) internal successors, (1146), 20 states have internal predecessors, (1146), 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) [2022-12-05 19:31:01,025 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:31:01,025 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:31:01,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 19:31:01,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 19:31:01,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:31:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:31:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2043678073, now seen corresponding path program 13 times [2022-12-05 19:31:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:31:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181519000] [2022-12-05 19:31:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:31:01,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:31:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:31:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:01,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:31:01,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181519000] [2022-12-05 19:31:01,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181519000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:31:01,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120314254] [2022-12-05 19:31:01,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:31:01,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:31:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:31:01,359 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) [2022-12-05 19:31:01,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 19:31:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:31:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:31:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:31:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:01,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:31:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120314254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:31:01,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:31:01,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-12-05 19:31:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642096606] [2022-12-05 19:31:01,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:31:01,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 19:31:01,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:31:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 19:31:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-05 19:31:01,672 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:31:01,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 2869 transitions, 89950 flow. Second operand has 20 states, 20 states have (on average 57.05) internal successors, (1141), 20 states have internal predecessors, (1141), 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) [2022-12-05 19:31:01,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:31:01,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:31:01,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:31:08,228 INFO L130 PetriNetUnfolder]: 2841/8304 cut-off events. [2022-12-05 19:31:08,228 INFO L131 PetriNetUnfolder]: For 243613/243652 co-relation queries the response was YES. [2022-12-05 19:31:08,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89230 conditions, 8304 events. 2841/8304 cut-off events. For 243613/243652 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 85642 event pairs, 49 based on Foata normal form. 44/8325 useless extension candidates. Maximal degree in co-relation 88147. Up to 1669 conditions per place. [2022-12-05 19:31:08,348 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 794 selfloop transitions, 2597 changer transitions 8/3459 dead transitions. [2022-12-05 19:31:08,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 3459 transitions, 115269 flow [2022-12-05 19:31:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 19:31:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 19:31:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2246 transitions. [2022-12-05 19:31:08,350 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7676008202323992 [2022-12-05 19:31:08,350 INFO L175 Difference]: Start difference. First operand has 619 places, 2869 transitions, 89950 flow. Second operand 38 states and 2246 transitions. [2022-12-05 19:31:08,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 3459 transitions, 115269 flow [2022-12-05 19:31:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3459 transitions, 113990 flow, removed 38 selfloop flow, removed 30 redundant places. [2022-12-05 19:31:12,582 INFO L231 Difference]: Finished difference. Result has 645 places, 3324 transitions, 114580 flow [2022-12-05 19:31:12,584 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=88835, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=114580, PETRI_PLACES=645, PETRI_TRANSITIONS=3324} [2022-12-05 19:31:12,584 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 577 predicate places. [2022-12-05 19:31:12,584 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 3324 transitions, 114580 flow [2022-12-05 19:31:12,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.05) internal successors, (1141), 20 states have internal predecessors, (1141), 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) [2022-12-05 19:31:12,585 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:31:12,585 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:31:12,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 19:31:12,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:31:12,786 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:31:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:31:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1235342533, now seen corresponding path program 14 times [2022-12-05 19:31:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:31:12,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047731672] [2022-12-05 19:31:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:31:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:31:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:31:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:12,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:31:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047731672] [2022-12-05 19:31:12,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047731672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:31:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30559376] [2022-12-05 19:31:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:31:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:31:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:31:12,989 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) [2022-12-05 19:31:12,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 19:31:13,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:31:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:31:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:31:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:31:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:13,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:31:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:13,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30559376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:31:13,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:31:13,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-05 19:31:13,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530467580] [2022-12-05 19:31:13,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:31:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:31:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:31:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:31:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:31:13,306 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:31:13,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 3324 transitions, 114580 flow. Second operand has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 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) [2022-12-05 19:31:13,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:31:13,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:31:13,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:31:20,980 INFO L130 PetriNetUnfolder]: 2919/8436 cut-off events. [2022-12-05 19:31:20,980 INFO L131 PetriNetUnfolder]: For 313507/313548 co-relation queries the response was YES. [2022-12-05 19:31:21,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98588 conditions, 8436 events. 2919/8436 cut-off events. For 313507/313548 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 86728 event pairs, 78 based on Foata normal form. 10/8429 useless extension candidates. Maximal degree in co-relation 97706. Up to 1747 conditions per place. [2022-12-05 19:31:21,125 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 992 selfloop transitions, 2432 changer transitions 13/3497 dead transitions. [2022-12-05 19:31:21,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 3497 transitions, 127189 flow [2022-12-05 19:31:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-05 19:31:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-05 19:31:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2451 transitions. [2022-12-05 19:31:21,128 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7578849721706865 [2022-12-05 19:31:21,128 INFO L175 Difference]: Start difference. First operand has 645 places, 3324 transitions, 114580 flow. Second operand 42 states and 2451 transitions. [2022-12-05 19:31:21,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 3497 transitions, 127189 flow [2022-12-05 19:31:26,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 3497 transitions, 126954 flow, removed 72 selfloop flow, removed 8 redundant places. [2022-12-05 19:31:26,467 INFO L231 Difference]: Finished difference. Result has 685 places, 3470 transitions, 126626 flow [2022-12-05 19:31:26,470 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=114373, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=126626, PETRI_PLACES=685, PETRI_TRANSITIONS=3470} [2022-12-05 19:31:26,470 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 617 predicate places. [2022-12-05 19:31:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 3470 transitions, 126626 flow [2022-12-05 19:31:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 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) [2022-12-05 19:31:26,471 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:31:26,471 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:31:26,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 19:31:26,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 19:31:26,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:31:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:31:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1213194859, now seen corresponding path program 15 times [2022-12-05 19:31:26,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:31:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922955800] [2022-12-05 19:31:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:31:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:31:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:31:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:31:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922955800] [2022-12-05 19:31:26,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922955800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:31:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972159419] [2022-12-05 19:31:26,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:31:26,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:31:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:31:26,832 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) [2022-12-05 19:31:26,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 19:31:26,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 19:31:26,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:31:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:31:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:31:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:31:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:27,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972159419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:31:27,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:31:27,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 19:31:27,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457311894] [2022-12-05 19:31:27,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:31:27,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:31:27,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:31:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:31:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:31:27,124 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:31:27,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 3470 transitions, 126626 flow. Second operand has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:31:27,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:31:27,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:31:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:31:36,078 INFO L130 PetriNetUnfolder]: 2957/8511 cut-off events. [2022-12-05 19:31:36,078 INFO L131 PetriNetUnfolder]: For 350947/350988 co-relation queries the response was YES. [2022-12-05 19:31:36,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105239 conditions, 8511 events. 2957/8511 cut-off events. For 350947/350988 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 87444 event pairs, 78 based on Foata normal form. 13/8507 useless extension candidates. Maximal degree in co-relation 104771. Up to 1774 conditions per place. [2022-12-05 19:31:36,214 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 806 selfloop transitions, 2731 changer transitions 8/3605 dead transitions. [2022-12-05 19:31:36,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 3605 transitions, 137855 flow [2022-12-05 19:31:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 19:31:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 19:31:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2179 transitions. [2022-12-05 19:31:36,216 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7648297648297648 [2022-12-05 19:31:36,216 INFO L175 Difference]: Start difference. First operand has 685 places, 3470 transitions, 126626 flow. Second operand 37 states and 2179 transitions. [2022-12-05 19:31:36,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 3605 transitions, 137855 flow [2022-12-05 19:31:42,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 3605 transitions, 136651 flow, removed 70 selfloop flow, removed 23 redundant places. [2022-12-05 19:31:42,242 INFO L231 Difference]: Finished difference. Result has 700 places, 3576 transitions, 138533 flow [2022-12-05 19:31:42,245 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=125435, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=138533, PETRI_PLACES=700, PETRI_TRANSITIONS=3576} [2022-12-05 19:31:42,245 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 632 predicate places. [2022-12-05 19:31:42,246 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 3576 transitions, 138533 flow [2022-12-05 19:31:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:31:42,246 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:31:42,246 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:31:42,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 19:31:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-05 19:31:42,450 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:31:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:31:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1999773575, now seen corresponding path program 16 times [2022-12-05 19:31:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:31:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857009059] [2022-12-05 19:31:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:31:42,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:31:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:31:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:31:42,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857009059] [2022-12-05 19:31:42,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857009059] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:31:42,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135665054] [2022-12-05 19:31:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:31:42,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:31:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:31:42,620 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) [2022-12-05 19:31:42,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 19:31:42,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:31:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:31:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:31:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:31:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:42,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:31:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:31:42,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135665054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:31:42,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:31:42,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 19:31:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41546681] [2022-12-05 19:31:42,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:31:42,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:31:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:31:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:31:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:31:42,954 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:31:42,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 3576 transitions, 138533 flow. Second operand has 18 states, 18 states have (on average 57.05555555555556) internal successors, (1027), 18 states have internal predecessors, (1027), 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) [2022-12-05 19:31:42,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:31:42,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:31:42,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:31:53,402 INFO L130 PetriNetUnfolder]: 3223/9555 cut-off events. [2022-12-05 19:31:53,402 INFO L131 PetriNetUnfolder]: For 435809/435836 co-relation queries the response was YES. [2022-12-05 19:31:53,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121496 conditions, 9555 events. 3223/9555 cut-off events. For 435809/435836 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 102209 event pairs, 58 based on Foata normal form. 34/9561 useless extension candidates. Maximal degree in co-relation 121146. Up to 1970 conditions per place. [2022-12-05 19:31:53,554 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 897 selfloop transitions, 2959 changer transitions 0/3916 dead transitions. [2022-12-05 19:31:53,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 3916 transitions, 159357 flow [2022-12-05 19:31:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-05 19:31:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-05 19:31:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2367 transitions. [2022-12-05 19:31:53,556 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7685064935064935 [2022-12-05 19:31:53,556 INFO L175 Difference]: Start difference. First operand has 700 places, 3576 transitions, 138533 flow. Second operand 40 states and 2367 transitions. [2022-12-05 19:31:53,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 3916 transitions, 159357 flow [2022-12-05 19:32:00,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 3916 transitions, 156877 flow, removed 72 selfloop flow, removed 24 redundant places. [2022-12-05 19:32:01,040 INFO L231 Difference]: Finished difference. Result has 710 places, 3803 transitions, 156401 flow [2022-12-05 19:32:01,043 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=135581, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=156401, PETRI_PLACES=710, PETRI_TRANSITIONS=3803} [2022-12-05 19:32:01,043 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 642 predicate places. [2022-12-05 19:32:01,043 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 3803 transitions, 156401 flow [2022-12-05 19:32:01,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.05555555555556) internal successors, (1027), 18 states have internal predecessors, (1027), 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) [2022-12-05 19:32:01,044 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:32:01,044 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:32:01,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-05 19:32:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:01,245 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:32:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:32:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash -755560803, now seen corresponding path program 17 times [2022-12-05 19:32:01,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:32:01,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180918236] [2022-12-05 19:32:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:32:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:32:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:32:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:32:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180918236] [2022-12-05 19:32:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180918236] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:32:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093835776] [2022-12-05 19:32:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:32:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:32:01,396 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) [2022-12-05 19:32:01,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 19:32:01,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:32:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:32:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:32:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:32:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:01,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:32:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:01,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093835776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:32:01,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:32:01,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-05 19:32:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911735442] [2022-12-05 19:32:01,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:32:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:32:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:32:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:32:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:32:01,839 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:32:01,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 3803 transitions, 156401 flow. Second operand has 17 states, 17 states have (on average 57.1764705882353) internal successors, (972), 17 states have internal predecessors, (972), 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) [2022-12-05 19:32:01,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:32:01,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:32:01,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:32:14,168 INFO L130 PetriNetUnfolder]: 3437/9981 cut-off events. [2022-12-05 19:32:14,168 INFO L131 PetriNetUnfolder]: For 525646/525671 co-relation queries the response was YES. [2022-12-05 19:32:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133908 conditions, 9981 events. 3437/9981 cut-off events. For 525646/525671 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 106627 event pairs, 98 based on Foata normal form. 9/9974 useless extension candidates. Maximal degree in co-relation 133356. Up to 2884 conditions per place. [2022-12-05 19:32:14,338 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1156 selfloop transitions, 2910 changer transitions 18/4144 dead transitions. [2022-12-05 19:32:14,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 4144 transitions, 178083 flow [2022-12-05 19:32:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 19:32:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 19:32:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2294 transitions. [2022-12-05 19:32:14,340 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7639027639027639 [2022-12-05 19:32:14,340 INFO L175 Difference]: Start difference. First operand has 710 places, 3803 transitions, 156401 flow. Second operand 39 states and 2294 transitions. [2022-12-05 19:32:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 4144 transitions, 178083 flow [2022-12-05 19:32:22,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 4144 transitions, 177697 flow, removed 18 selfloop flow, removed 23 redundant places. [2022-12-05 19:32:22,410 INFO L231 Difference]: Finished difference. Result has 743 places, 4120 transitions, 180379 flow [2022-12-05 19:32:22,413 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=155966, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=180379, PETRI_PLACES=743, PETRI_TRANSITIONS=4120} [2022-12-05 19:32:22,413 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 675 predicate places. [2022-12-05 19:32:22,413 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 4120 transitions, 180379 flow [2022-12-05 19:32:22,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.1764705882353) internal successors, (972), 17 states have internal predecessors, (972), 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) [2022-12-05 19:32:22,414 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:32:22,415 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:32:22,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 19:32:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:22,620 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:32:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:32:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1382661097, now seen corresponding path program 18 times [2022-12-05 19:32:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:32:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523881144] [2022-12-05 19:32:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:32:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:32:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:32:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:32:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523881144] [2022-12-05 19:32:22,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523881144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:32:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933567415] [2022-12-05 19:32:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:32:22,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:32:22,796 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) [2022-12-05 19:32:22,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 19:32:22,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 19:32:22,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:32:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 19:32:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:32:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:22,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:32:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933567415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:32:23,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:32:23,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-05 19:32:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201520237] [2022-12-05 19:32:23,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:32:23,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 19:32:23,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:32:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 19:32:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-05 19:32:23,099 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:32:23,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 4120 transitions, 180379 flow. Second operand has 17 states, 17 states have (on average 57.64705882352941) internal successors, (980), 17 states have internal predecessors, (980), 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) [2022-12-05 19:32:23,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:32:23,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:32:23,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:32:39,399 INFO L130 PetriNetUnfolder]: 4387/12229 cut-off events. [2022-12-05 19:32:39,399 INFO L131 PetriNetUnfolder]: For 776069/776071 co-relation queries the response was YES. [2022-12-05 19:32:39,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181810 conditions, 12229 events. 4387/12229 cut-off events. For 776069/776071 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 132015 event pairs, 114 based on Foata normal form. 45/12247 useless extension candidates. Maximal degree in co-relation 181284. Up to 3676 conditions per place. [2022-12-05 19:32:39,654 INFO L137 encePairwiseOnDemand]: 67/77 looper letters, 1508 selfloop transitions, 3817 changer transitions 4/5389 dead transitions. [2022-12-05 19:32:39,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 5389 transitions, 248581 flow [2022-12-05 19:32:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-05 19:32:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-05 19:32:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2439 transitions. [2022-12-05 19:32:39,657 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.772568894520114 [2022-12-05 19:32:39,657 INFO L175 Difference]: Start difference. First operand has 743 places, 4120 transitions, 180379 flow. Second operand 41 states and 2439 transitions. [2022-12-05 19:32:39,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 5389 transitions, 248581 flow [2022-12-05 19:32:54,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 5389 transitions, 246509 flow, removed 110 selfloop flow, removed 15 redundant places. [2022-12-05 19:32:54,360 INFO L231 Difference]: Finished difference. Result has 796 places, 5283 transitions, 248136 flow [2022-12-05 19:32:54,363 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=178692, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=248136, PETRI_PLACES=796, PETRI_TRANSITIONS=5283} [2022-12-05 19:32:54,363 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 728 predicate places. [2022-12-05 19:32:54,363 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 5283 transitions, 248136 flow [2022-12-05 19:32:54,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.64705882352941) internal successors, (980), 17 states have internal predecessors, (980), 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) [2022-12-05 19:32:54,364 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:32:54,364 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:32:54,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-05 19:32:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:54,568 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:32:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:32:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1808665583, now seen corresponding path program 19 times [2022-12-05 19:32:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:32:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256072864] [2022-12-05 19:32:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:32:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:32:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:32:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:32:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256072864] [2022-12-05 19:32:54,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256072864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:32:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176592115] [2022-12-05 19:32:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:32:54,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:32:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:32:54,697 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) [2022-12-05 19:32:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 19:32:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:32:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:32:54,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:32:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:54,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:32:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:32:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176592115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:32:55,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:32:55,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 19:32:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223735846] [2022-12-05 19:32:55,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:32:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 19:32:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:32:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 19:32:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-05 19:32:55,035 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:32:55,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 5283 transitions, 248136 flow. Second operand has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:32:55,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:32:55,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:32:55,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:33:21,566 INFO L130 PetriNetUnfolder]: 4432/12323 cut-off events. [2022-12-05 19:33:21,566 INFO L131 PetriNetUnfolder]: For 897509/897511 co-relation queries the response was YES. [2022-12-05 19:33:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193422 conditions, 12323 events. 4432/12323 cut-off events. For 897509/897511 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 132815 event pairs, 118 based on Foata normal form. 7/12297 useless extension candidates. Maximal degree in co-relation 193045. Up to 4405 conditions per place. [2022-12-05 19:33:21,898 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 2568 selfloop transitions, 2768 changer transitions 11/5407 dead transitions. [2022-12-05 19:33:21,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 5407 transitions, 264068 flow [2022-12-05 19:33:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 19:33:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 19:33:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1641 transitions. [2022-12-05 19:33:21,901 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7611317254174397 [2022-12-05 19:33:21,901 INFO L175 Difference]: Start difference. First operand has 796 places, 5283 transitions, 248136 flow. Second operand 28 states and 1641 transitions. [2022-12-05 19:33:21,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 5407 transitions, 264068 flow [2022-12-05 19:33:40,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 5407 transitions, 261730 flow, removed 873 selfloop flow, removed 3 redundant places. [2022-12-05 19:33:40,496 INFO L231 Difference]: Finished difference. Result has 838 places, 5382 transitions, 260412 flow [2022-12-05 19:33:40,500 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=245848, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2671, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=260412, PETRI_PLACES=838, PETRI_TRANSITIONS=5382} [2022-12-05 19:33:40,501 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 770 predicate places. [2022-12-05 19:33:40,501 INFO L495 AbstractCegarLoop]: Abstraction has has 838 places, 5382 transitions, 260412 flow [2022-12-05 19:33:40,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.0) internal successors, (1026), 18 states have internal predecessors, (1026), 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) [2022-12-05 19:33:40,501 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:33:40,501 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:33:40,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-05 19:33:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-05 19:33:40,708 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:33:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:33:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1014317069, now seen corresponding path program 20 times [2022-12-05 19:33:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:33:40,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666572680] [2022-12-05 19:33:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:33:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:33:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:33:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:33:40,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:33:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666572680] [2022-12-05 19:33:40,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666572680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:33:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308270271] [2022-12-05 19:33:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:33:40,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:33:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:33:40,913 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) [2022-12-05 19:33:40,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 19:33:40,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:33:40,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:33:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:33:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:33:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:33:41,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:33:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:33:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308270271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:33:41,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:33:41,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:33:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928982671] [2022-12-05 19:33:41,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:33:41,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:33:41,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:33:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:33:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:33:41,288 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:33:41,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 5382 transitions, 260412 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 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) [2022-12-05 19:33:41,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:33:41,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:33:41,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:34:06,527 INFO L130 PetriNetUnfolder]: 4508/12510 cut-off events. [2022-12-05 19:34:06,528 INFO L131 PetriNetUnfolder]: For 967118/967121 co-relation queries the response was YES. [2022-12-05 19:34:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203836 conditions, 12510 events. 4508/12510 cut-off events. For 967118/967121 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 135284 event pairs, 107 based on Foata normal form. 15/12499 useless extension candidates. Maximal degree in co-relation 203437. Up to 2919 conditions per place. [2022-12-05 19:34:06,817 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1095 selfloop transitions, 4367 changer transitions 10/5532 dead transitions. [2022-12-05 19:34:06,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 882 places, 5532 transitions, 277884 flow [2022-12-05 19:34:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-05 19:34:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-05 19:34:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2914 transitions. [2022-12-05 19:34:06,820 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7568831168831169 [2022-12-05 19:34:06,820 INFO L175 Difference]: Start difference. First operand has 838 places, 5382 transitions, 260412 flow. Second operand 50 states and 2914 transitions. [2022-12-05 19:34:06,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 882 places, 5532 transitions, 277884 flow [2022-12-05 19:34:26,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 5532 transitions, 277222 flow, removed 82 selfloop flow, removed 9 redundant places. [2022-12-05 19:34:27,105 INFO L231 Difference]: Finished difference. Result has 887 places, 5497 transitions, 281275 flow [2022-12-05 19:34:27,109 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=259680, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=281275, PETRI_PLACES=887, PETRI_TRANSITIONS=5497} [2022-12-05 19:34:27,109 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 819 predicate places. [2022-12-05 19:34:27,109 INFO L495 AbstractCegarLoop]: Abstraction has has 887 places, 5497 transitions, 281275 flow [2022-12-05 19:34:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 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) [2022-12-05 19:34:27,109 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:34:27,110 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:34:27,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-05 19:34:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-05 19:34:27,313 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:34:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:34:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1320727147, now seen corresponding path program 21 times [2022-12-05 19:34:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:34:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054806177] [2022-12-05 19:34:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:34:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:34:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:34:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:34:27,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:34:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054806177] [2022-12-05 19:34:27,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054806177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:34:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726576408] [2022-12-05 19:34:27,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 19:34:27,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:34:27,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:34:27,449 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) [2022-12-05 19:34:27,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 19:34:27,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 19:34:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:34:27,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:34:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:34:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:34:27,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:34:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:34:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726576408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:34:27,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:34:27,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-05 19:34:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423259317] [2022-12-05 19:34:27,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:34:27,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:34:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:34:27,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:34:27,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:34:27,837 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:34:27,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 5497 transitions, 281275 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 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) [2022-12-05 19:34:27,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:34:27,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:34:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:34:54,542 INFO L130 PetriNetUnfolder]: 4552/12644 cut-off events. [2022-12-05 19:34:54,542 INFO L131 PetriNetUnfolder]: For 1104854/1104857 co-relation queries the response was YES. [2022-12-05 19:34:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216535 conditions, 12644 events. 4552/12644 cut-off events. For 1104854/1104857 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 136941 event pairs, 114 based on Foata normal form. 8/12626 useless extension candidates. Maximal degree in co-relation 216257. Up to 3745 conditions per place. [2022-12-05 19:34:54,845 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1896 selfloop transitions, 3627 changer transitions 4/5587 dead transitions. [2022-12-05 19:34:54,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 5587 transitions, 296589 flow [2022-12-05 19:34:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 19:34:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 19:34:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2278 transitions. [2022-12-05 19:34:54,847 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7585747585747585 [2022-12-05 19:34:54,847 INFO L175 Difference]: Start difference. First operand has 887 places, 5497 transitions, 281275 flow. Second operand 39 states and 2278 transitions. [2022-12-05 19:34:54,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 5587 transitions, 296589 flow [2022-12-05 19:35:17,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 5587 transitions, 294979 flow, removed 248 selfloop flow, removed 17 redundant places. [2022-12-05 19:35:18,152 INFO L231 Difference]: Finished difference. Result has 917 places, 5559 transitions, 296186 flow [2022-12-05 19:35:18,156 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=279785, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=296186, PETRI_PLACES=917, PETRI_TRANSITIONS=5559} [2022-12-05 19:35:18,156 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 849 predicate places. [2022-12-05 19:35:18,156 INFO L495 AbstractCegarLoop]: Abstraction has has 917 places, 5559 transitions, 296186 flow [2022-12-05 19:35:18,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 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) [2022-12-05 19:35:18,157 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:35:18,157 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:35:18,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-05 19:35:18,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:35:18,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:35:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:35:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2030919407, now seen corresponding path program 22 times [2022-12-05 19:35:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:35:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673727177] [2022-12-05 19:35:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:35:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:35:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:35:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:35:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:35:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673727177] [2022-12-05 19:35:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673727177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:35:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406619170] [2022-12-05 19:35:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 19:35:18,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:35:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:35:18,482 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) [2022-12-05 19:35:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 19:35:18,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 19:35:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:35:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 19:35:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:35:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:35:18,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:35:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:35:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406619170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:35:18,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:35:18,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-05 19:35:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518138330] [2022-12-05 19:35:18,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:35:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 19:35:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:35:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 19:35:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-05 19:35:18,816 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-05 19:35:18,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 917 places, 5559 transitions, 296186 flow. Second operand has 19 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 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) [2022-12-05 19:35:18,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:35:18,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-05 19:35:18,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:35:45,567 INFO L130 PetriNetUnfolder]: 4551/12596 cut-off events. [2022-12-05 19:35:45,567 INFO L131 PetriNetUnfolder]: For 1205073/1205079 co-relation queries the response was YES. [2022-12-05 19:35:45,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223685 conditions, 12596 events. 4551/12596 cut-off events. For 1205073/1205079 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 136217 event pairs, 118 based on Foata normal form. 4/12569 useless extension candidates. Maximal degree in co-relation 223430. Up to 4197 conditions per place. [2022-12-05 19:35:45,848 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 2463 selfloop transitions, 3028 changer transitions 5/5556 dead transitions. [2022-12-05 19:35:45,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 918 places, 5556 transitions, 306826 flow [2022-12-05 19:35:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 19:35:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 19:35:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1002 transitions. [2022-12-05 19:35:45,849 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7654698242933538 [2022-12-05 19:35:45,849 INFO L175 Difference]: Start difference. First operand has 917 places, 5559 transitions, 296186 flow. Second operand 17 states and 1002 transitions. [2022-12-05 19:35:45,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 918 places, 5556 transitions, 306826 flow [2022-12-05 19:36:09,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 5556 transitions, 305604 flow, removed 126 selfloop flow, removed 19 redundant places. [2022-12-05 19:36:09,485 INFO L231 Difference]: Finished difference. Result has 902 places, 5546 transitions, 304667 flow [2022-12-05 19:36:09,488 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=294451, PETRI_DIFFERENCE_MINUEND_PLACES=883, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=304667, PETRI_PLACES=902, PETRI_TRANSITIONS=5546} [2022-12-05 19:36:09,489 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 834 predicate places. [2022-12-05 19:36:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 902 places, 5546 transitions, 304667 flow [2022-12-05 19:36:09,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 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) [2022-12-05 19:36:09,503 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:36:09,503 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:36:09,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 19:36:09,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:36:09,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:36:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:36:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2016162014, now seen corresponding path program 23 times [2022-12-05 19:36:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:36:09,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537296746] [2022-12-05 19:36:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:36:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:36:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:36:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:36:10,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:36:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537296746] [2022-12-05 19:36:10,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537296746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:36:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744538211] [2022-12-05 19:36:10,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 19:36:10,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:36:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:36:10,141 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) [2022-12-05 19:36:10,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 19:36:10,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 19:36:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:36:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 19:36:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:36:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:36:10,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:36:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:36:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744538211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:36:10,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:36:10,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 24 [2022-12-05 19:36:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2951915] [2022-12-05 19:36:10,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:36:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 19:36:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:36:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 19:36:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-05 19:36:10,870 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 77 [2022-12-05 19:36:10,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 5546 transitions, 304667 flow. Second operand has 24 states, 24 states have (on average 45.166666666666664) internal successors, (1084), 24 states have internal predecessors, (1084), 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) [2022-12-05 19:36:10,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:36:10,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 77 [2022-12-05 19:36:10,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:36:54,373 INFO L130 PetriNetUnfolder]: 6380/18518 cut-off events. [2022-12-05 19:36:54,374 INFO L131 PetriNetUnfolder]: For 1704677/1704677 co-relation queries the response was YES. [2022-12-05 19:36:54,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322605 conditions, 18518 events. 6380/18518 cut-off events. For 1704677/1704677 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 216749 event pairs, 155 based on Foata normal form. 53/18530 useless extension candidates. Maximal degree in co-relation 322349. Up to 3990 conditions per place. [2022-12-05 19:36:54,846 INFO L137 encePairwiseOnDemand]: 62/77 looper letters, 4233 selfloop transitions, 3663 changer transitions 510/8439 dead transitions. [2022-12-05 19:36:54,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 927 places, 8439 transitions, 473466 flow [2022-12-05 19:36:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 19:36:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 19:36:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1678 transitions. [2022-12-05 19:36:54,848 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6226345083487941 [2022-12-05 19:36:54,848 INFO L175 Difference]: Start difference. First operand has 902 places, 5546 transitions, 304667 flow. Second operand 35 states and 1678 transitions. [2022-12-05 19:36:54,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 927 places, 8439 transitions, 473466 flow [2022-12-05 19:37:35,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 917 places, 8439 transitions, 469506 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-12-05 19:37:36,000 INFO L231 Difference]: Finished difference. Result has 935 places, 6635 transitions, 386489 flow [2022-12-05 19:37:36,004 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=302266, PETRI_DIFFERENCE_MINUEND_PLACES=883, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=386489, PETRI_PLACES=935, PETRI_TRANSITIONS=6635} [2022-12-05 19:37:36,004 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 867 predicate places. [2022-12-05 19:37:36,004 INFO L495 AbstractCegarLoop]: Abstraction has has 935 places, 6635 transitions, 386489 flow [2022-12-05 19:37:36,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 45.166666666666664) internal successors, (1084), 24 states have internal predecessors, (1084), 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) [2022-12-05 19:37:36,005 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:37:36,005 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:37:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-05 19:37:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-05 19:37:36,209 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:37:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:37:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2088909014, now seen corresponding path program 24 times [2022-12-05 19:37:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:37:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629382624] [2022-12-05 19:37:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:37:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:37:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:37:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:37:36,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:37:36,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629382624] [2022-12-05 19:37:36,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629382624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:37:36,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139672434] [2022-12-05 19:37:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 19:37:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:37:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:37:36,461 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) [2022-12-05 19:37:36,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 19:37:36,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 19:37:36,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:37:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 19:37:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:37:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:37:36,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:38:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:38:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139672434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:38:01,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:38:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 28 [2022-12-05 19:38:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23242110] [2022-12-05 19:38:01,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:38:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 19:38:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:38:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 19:38:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-12-05 19:38:01,629 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 77 [2022-12-05 19:38:01,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 935 places, 6635 transitions, 386489 flow. Second operand has 28 states, 28 states have (on average 45.142857142857146) internal successors, (1264), 28 states have internal predecessors, (1264), 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) [2022-12-05 19:38:01,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:38:01,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 77 [2022-12-05 19:38:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:39:18,594 INFO L130 PetriNetUnfolder]: 6968/20168 cut-off events. [2022-12-05 19:39:18,595 INFO L131 PetriNetUnfolder]: For 2143786/2143786 co-relation queries the response was YES. [2022-12-05 19:39:19,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372401 conditions, 20168 events. 6968/20168 cut-off events. For 2143786/2143786 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 235974 event pairs, 81 based on Foata normal form. 60/20194 useless extension candidates. Maximal degree in co-relation 372127. Up to 4825 conditions per place. [2022-12-05 19:39:19,321 INFO L137 encePairwiseOnDemand]: 60/77 looper letters, 3839 selfloop transitions, 4911 changer transitions 159/8942 dead transitions. [2022-12-05 19:39:19,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 977 places, 8942 transitions, 523240 flow [2022-12-05 19:39:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-05 19:39:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-05 19:39:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2135 transitions. [2022-12-05 19:39:19,324 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2022-12-05 19:39:19,324 INFO L175 Difference]: Start difference. First operand has 935 places, 6635 transitions, 386489 flow. Second operand 45 states and 2135 transitions. [2022-12-05 19:39:19,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 977 places, 8942 transitions, 523240 flow [2022-12-05 19:40:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 8942 transitions, 520865 flow, removed 485 selfloop flow, removed 16 redundant places. [2022-12-05 19:40:14,381 INFO L231 Difference]: Finished difference. Result has 976 places, 7516 transitions, 455347 flow [2022-12-05 19:40:14,385 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=384728, PETRI_DIFFERENCE_MINUEND_PLACES=917, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4037, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=455347, PETRI_PLACES=976, PETRI_TRANSITIONS=7516} [2022-12-05 19:40:14,385 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 908 predicate places. [2022-12-05 19:40:14,385 INFO L495 AbstractCegarLoop]: Abstraction has has 976 places, 7516 transitions, 455347 flow [2022-12-05 19:40:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 45.142857142857146) internal successors, (1264), 28 states have internal predecessors, (1264), 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) [2022-12-05 19:40:14,386 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:40:14,386 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:40:14,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-05 19:40:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 19:40:14,590 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:40:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:40:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1987196640, now seen corresponding path program 25 times [2022-12-05 19:40:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:40:14,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726794999] [2022-12-05 19:40:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:40:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:40:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:40:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:40:15,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:40:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726794999] [2022-12-05 19:40:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726794999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:40:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604469466] [2022-12-05 19:40:15,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 19:40:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:40:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:40:15,055 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) [2022-12-05 19:40:15,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 19:40:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:40:15,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 19:40:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:40:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 19:40:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:40:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 19:40:15,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604469466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:40:15,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:40:15,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 23 [2022-12-05 19:40:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240014264] [2022-12-05 19:40:15,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:40:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 19:40:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:40:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 19:40:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-12-05 19:40:15,566 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-12-05 19:40:15,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 976 places, 7516 transitions, 455347 flow. Second operand has 23 states, 23 states have (on average 52.47826086956522) internal successors, (1207), 23 states have internal predecessors, (1207), 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) [2022-12-05 19:40:15,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:40:15,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-12-05 19:40:15,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 19:41:29,532 INFO L130 PetriNetUnfolder]: 6912/19544 cut-off events. [2022-12-05 19:41:29,532 INFO L131 PetriNetUnfolder]: For 2314220/2314220 co-relation queries the response was YES. [2022-12-05 19:41:29,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375789 conditions, 19544 events. 6912/19544 cut-off events. For 2314220/2314220 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 224506 event pairs, 33 based on Foata normal form. 108/19633 useless extension candidates. Maximal degree in co-relation 375509. Up to 4340 conditions per place. [2022-12-05 19:41:30,072 INFO L137 encePairwiseOnDemand]: 63/77 looper letters, 2985 selfloop transitions, 5166 changer transitions 91/8281 dead transitions. [2022-12-05 19:41:30,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 8281 transitions, 505948 flow [2022-12-05 19:41:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-05 19:41:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-05 19:41:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2709 transitions. [2022-12-05 19:41:30,074 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7036363636363636 [2022-12-05 19:41:30,074 INFO L175 Difference]: Start difference. First operand has 976 places, 7516 transitions, 455347 flow. Second operand 50 states and 2709 transitions. [2022-12-05 19:41:30,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 8281 transitions, 505948 flow [2022-12-05 19:42:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1007 places, 8281 transitions, 504026 flow, removed 311 selfloop flow, removed 16 redundant places. [2022-12-05 19:42:26,734 INFO L231 Difference]: Finished difference. Result has 1024 places, 7626 transitions, 474214 flow [2022-12-05 19:42:26,738 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=452645, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5032, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=474214, PETRI_PLACES=1024, PETRI_TRANSITIONS=7626} [2022-12-05 19:42:26,738 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 956 predicate places. [2022-12-05 19:42:26,738 INFO L495 AbstractCegarLoop]: Abstraction has has 1024 places, 7626 transitions, 474214 flow [2022-12-05 19:42:26,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.47826086956522) internal successors, (1207), 23 states have internal predecessors, (1207), 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) [2022-12-05 19:42:26,739 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 19:42:26,739 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 19:42:26,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-05 19:42:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-05 19:42:26,943 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 19:42:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 19:42:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 456085484, now seen corresponding path program 26 times [2022-12-05 19:42:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 19:42:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867754812] [2022-12-05 19:42:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 19:42:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 19:42:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 19:42:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:42:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 19:42:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867754812] [2022-12-05 19:42:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867754812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 19:42:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843772051] [2022-12-05 19:42:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 19:42:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 19:42:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 19:42:27,158 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) [2022-12-05 19:42:27,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 19:42:27,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 19:42:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 19:42:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-05 19:42:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 19:42:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 19:42:27,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 19:42:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 19:42:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843772051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 19:42:28,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 19:42:28,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 32 [2022-12-05 19:42:28,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385804593] [2022-12-05 19:42:28,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 19:42:28,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 19:42:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 19:42:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 19:42:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-12-05 19:42:28,141 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 77 [2022-12-05 19:42:28,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 7626 transitions, 474214 flow. Second operand has 32 states, 32 states have (on average 44.71875) internal successors, (1431), 32 states have internal predecessors, (1431), 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) [2022-12-05 19:42:28,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 19:42:28,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 77 [2022-12-05 19:42:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-05 19:42:50,681 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 [2022-12-05 19:42:50,703 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 [2022-12-05 19:42:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 19:42:50,833 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 19:42:50,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-05 19:42:51,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-05 19:42:51,034 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. [2022-12-05 19:42:51,035 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 19:42:51,035 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 19:42:51,035 INFO L458 BasicCegarLoop]: Path program histogram: [26, 2, 1] [2022-12-05 19:42:51,037 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 19:42:51,037 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 19:42:51,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 07:42:51 BasicIcfg [2022-12-05 19:42:51,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 19:42:51,040 INFO L158 Benchmark]: Toolchain (without parser) took 763690.84ms. Allocated memory was 164.6MB in the beginning and 3.3GB in the end (delta: 3.2GB). Free memory was 141.9MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 164.6MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.23ms. Allocated memory is still 164.6MB. Free memory was 141.9MB in the beginning and 130.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.55ms. Allocated memory is still 164.6MB. Free memory was 130.4MB in the beginning and 128.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: Boogie Preprocessor took 30.16ms. Allocated memory is still 164.6MB. Free memory was 128.9MB in the beginning and 127.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: RCFGBuilder took 349.10ms. Allocated memory is still 164.6MB. Free memory was 127.3MB in the beginning and 114.1MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 19:42:51,041 INFO L158 Benchmark]: TraceAbstraction took 763077.42ms. Allocated memory was 164.6MB in the beginning and 3.3GB in the end (delta: 3.2GB). Free memory was 113.2MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-05 19:42:51,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 164.6MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.23ms. Allocated memory is still 164.6MB. Free memory was 141.9MB in the beginning and 130.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.55ms. Allocated memory is still 164.6MB. Free memory was 130.4MB in the beginning and 128.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.16ms. Allocated memory is still 164.6MB. Free memory was 128.9MB in the beginning and 127.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 349.10ms. Allocated memory is still 164.6MB. Free memory was 127.3MB in the beginning and 114.1MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 763077.42ms. Allocated memory was 164.6MB in the beginning and 3.3GB in the end (delta: 3.2GB). Free memory was 113.2MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 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: 762.9s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 715.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4201 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4201 mSDsluCounter, 3262 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2675 mSDsCounter, 1134 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12894 IncrementalHoareTripleChecker+Invalid, 14028 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1134 mSolverCounterUnsat, 587 mSDtfsCounter, 12894 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4521 GetRequests, 3220 SyntacticMatches, 50 SemanticMatches, 1250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20362 ImplicationChecksByTransitivity, 31.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=474214occurred in iteration=28, InterpolantAutomatonStates: 1059, 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, 1.0s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 3659 NumberOfCodeBlocks, 3597 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 5291 ConstructedInterpolants, 0 QuantifiedInterpolants, 27924 SizeOfPredicates, 274 NumberOfNonLiveVariables, 3969 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 82 InterpolantComputations, 3 PerfectInterpolantSequences, 331/627 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