/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:06:14,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:06:14,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:06:14,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:06:14,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:06:14,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:06:14,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:06:14,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:06:14,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:06:14,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:06:14,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:06:14,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:06:14,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:06:14,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:06:14,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:06:14,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:06:14,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:06:14,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:06:14,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:06:14,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:06:14,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:06:14,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:06:14,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:06:14,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:06:14,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 22:06:14,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 22:06:14,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 22:06:14,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 22:06:14,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 22:06:14,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 22:06:14,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:06:14,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:06:14,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:06:14,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:06:14,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:06:14,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:06:14,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:06:14,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:06:14,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:06:14,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:06:14,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:06:14,739 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-SemanticLbe.epf [2022-12-05 22:06:14,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:06:14,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:06:14,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:06:14,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:06:14,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:06:14,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:06:14,779 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:06:14,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:06:14,779 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:06:14,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:06:14,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:06:14,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:06:14,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:06:14,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:06:14,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:06:14,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:06:14,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:06:14,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:06:14,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:06:14,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:06:15,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:06:15,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:06:15,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:06:15,112 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:06:15,112 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:06:15,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-05 22:06:16,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:06:16,455 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:06:16,456 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-05 22:06:16,467 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5271cfc9/e5fb24166de14d6ca1e81d63d7a04ef8/FLAG2f60c780a [2022-12-05 22:06:16,478 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5271cfc9/e5fb24166de14d6ca1e81d63d7a04ef8 [2022-12-05 22:06:16,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:06:16,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:06:16,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:06:16,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:06:16,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:06:16,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504efc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16, skipping insertion in model container [2022-12-05 22:06:16,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:06:16,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:06:16,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,679 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,708 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-05 22:06:16,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:06:16,726 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:06:16,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,746 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:06:16,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:06:16,768 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-05 22:06:16,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:06:16,780 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:06:16,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16 WrapperNode [2022-12-05 22:06:16,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:06:16,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:06:16,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:06:16,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:06:16,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,831 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-12-05 22:06:16,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:06:16,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:06:16,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:06:16,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:06:16,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,867 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:06:16,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:06:16,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:06:16,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:06:16,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (1/1) ... [2022-12-05 22:06:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:06:16,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:16,913 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 22:06:16,916 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 22:06:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:06:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:06:16,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:06:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:06:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 22:06:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-05 22:06:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:06:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:06:16,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:06:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:06:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:06:16,944 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 22:06:17,034 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:06:17,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:06:17,237 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:06:17,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:06:17,335 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 22:06:17,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:06:17 BoogieIcfgContainer [2022-12-05 22:06:17,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:06:17,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:06:17,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:06:17,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:06:17,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:06:16" (1/3) ... [2022-12-05 22:06:17,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ede225d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:06:17, skipping insertion in model container [2022-12-05 22:06:17,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:06:16" (2/3) ... [2022-12-05 22:06:17,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ede225d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:06:17, skipping insertion in model container [2022-12-05 22:06:17,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:06:17" (3/3) ... [2022-12-05 22:06:17,350 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-05 22:06:17,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:06:17,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:06:17,365 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:06:17,466 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-05 22:06:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 124 transitions, 280 flow [2022-12-05 22:06:17,565 INFO L130 PetriNetUnfolder]: 10/120 cut-off events. [2022-12-05 22:06:17,566 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:06:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 10/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-12-05 22:06:17,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 124 transitions, 280 flow [2022-12-05 22:06:17,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-12-05 22:06:17,577 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:06:17,595 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-05 22:06:17,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 108 transitions, 240 flow [2022-12-05 22:06:17,636 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-12-05 22:06:17,637 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:06:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 108 events. 10/108 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-12-05 22:06:17,642 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-05 22:06:17,642 INFO L188 LiptonReduction]: Number of co-enabled transitions 1224 [2022-12-05 22:06:22,004 INFO L203 LiptonReduction]: Total number of compositions: 83 [2022-12-05 22:06:22,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:06:22,025 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;@1a43df25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:06:22,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-05 22:06:22,031 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2022-12-05 22:06:22,031 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 22:06:22,031 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:22,032 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] [2022-12-05 22:06:22,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2052267608, now seen corresponding path program 1 times [2022-12-05 22:06:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297754306] [2022-12-05 22:06:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:22,458 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 22:06:22,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:22,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297754306] [2022-12-05 22:06:22,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297754306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:22,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:06:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651023762] [2022-12-05 22:06:22,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:22,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:06:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:06:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:06:22,485 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:22,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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 22:06:22,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:22,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:22,635 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2022-12-05 22:06:22,636 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 22:06:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1712 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2022-12-05 22:06:22,647 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2022-12-05 22:06:22,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2022-12-05 22:06:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:06:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:06:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2022-12-05 22:06:22,658 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.64 [2022-12-05 22:06:22,659 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 48 transitions. [2022-12-05 22:06:22,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2022-12-05 22:06:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-05 22:06:22,666 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2022-12-05 22:06:22,668 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2022-12-05 22:06:22,672 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2022-12-05 22:06:22,672 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2022-12-05 22:06:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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 22:06:22,672 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:22,673 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] [2022-12-05 22:06:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:06:22,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1346749667, now seen corresponding path program 1 times [2022-12-05 22:06:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890399152] [2022-12-05 22:06:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:22,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:22,927 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 22:06:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:22,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890399152] [2022-12-05 22:06:22,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890399152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:22,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:22,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631579623] [2022-12-05 22:06:22,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:22,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:22,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:22,930 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:22,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:22,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:22,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:22,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:23,132 INFO L130 PetriNetUnfolder]: 611/869 cut-off events. [2022-12-05 22:06:23,132 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2022-12-05 22:06:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 869 events. 611/869 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2779 event pairs, 51 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 720. Up to 397 conditions per place. [2022-12-05 22:06:23,138 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 66 selfloop transitions, 8 changer transitions 4/78 dead transitions. [2022-12-05 22:06:23,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 377 flow [2022-12-05 22:06:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:06:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:06:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2022-12-05 22:06:23,140 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.608 [2022-12-05 22:06:23,140 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 5 states and 76 transitions. [2022-12-05 22:06:23,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 377 flow [2022-12-05 22:06:23,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 78 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:06:23,142 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 133 flow [2022-12-05 22:06:23,143 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-12-05 22:06:23,143 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-12-05 22:06:23,143 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 133 flow [2022-12-05 22:06:23,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:23,144 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:23,144 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] [2022-12-05 22:06:23,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:06:23,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127190, now seen corresponding path program 1 times [2022-12-05 22:06:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020754993] [2022-12-05 22:06:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:23,338 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 22:06:23,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:23,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020754993] [2022-12-05 22:06:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020754993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595275026] [2022-12-05 22:06:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:23,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:23,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:23,347 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 22:06:23,357 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 22:06:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:06:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:23,606 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 22:06:23,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:23,686 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 22:06:23,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595275026] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:23,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:06:23,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-05 22:06:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930896725] [2022-12-05 22:06:23,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-05 22:06:23,688 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:23,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:23,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:23,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:23,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:23,884 INFO L130 PetriNetUnfolder]: 927/1317 cut-off events. [2022-12-05 22:06:23,885 INFO L131 PetriNetUnfolder]: For 768/768 co-relation queries the response was YES. [2022-12-05 22:06:23,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3785 conditions, 1317 events. 927/1317 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4499 event pairs, 233 based on Foata normal form. 36/1353 useless extension candidates. Maximal degree in co-relation 1253. Up to 563 conditions per place. [2022-12-05 22:06:23,916 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 65 selfloop transitions, 8 changer transitions 2/75 dead transitions. [2022-12-05 22:06:23,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 75 transitions, 419 flow [2022-12-05 22:06:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2022-12-05 22:06:23,919 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.67 [2022-12-05 22:06:23,919 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 133 flow. Second operand 4 states and 67 transitions. [2022-12-05 22:06:23,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 75 transitions, 419 flow [2022-12-05 22:06:23,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 75 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:23,924 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 180 flow [2022-12-05 22:06:23,925 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2022-12-05 22:06:23,926 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2022-12-05 22:06:23,926 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 180 flow [2022-12-05 22:06:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:23,926 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:23,926 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] [2022-12-05 22:06:23,938 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 22:06:24,132 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 22:06:24,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1270105152, now seen corresponding path program 2 times [2022-12-05 22:06:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:24,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683877928] [2022-12-05 22:06:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:24,262 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 22:06:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:24,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683877928] [2022-12-05 22:06:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683877928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:24,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299941882] [2022-12-05 22:06:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:24,264 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:24,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:24,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:24,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:24,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:24,460 INFO L130 PetriNetUnfolder]: 1025/1463 cut-off events. [2022-12-05 22:06:24,461 INFO L131 PetriNetUnfolder]: For 2130/2130 co-relation queries the response was YES. [2022-12-05 22:06:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4599 conditions, 1463 events. 1025/1463 cut-off events. For 2130/2130 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5254 event pairs, 161 based on Foata normal form. 46/1509 useless extension candidates. Maximal degree in co-relation 1986. Up to 1109 conditions per place. [2022-12-05 22:06:24,471 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 66 selfloop transitions, 9 changer transitions 2/77 dead transitions. [2022-12-05 22:06:24,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 77 transitions, 504 flow [2022-12-05 22:06:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2022-12-05 22:06:24,473 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.61 [2022-12-05 22:06:24,473 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 180 flow. Second operand 4 states and 61 transitions. [2022-12-05 22:06:24,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 77 transitions, 504 flow [2022-12-05 22:06:24,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 77 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:24,477 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 266 flow [2022-12-05 22:06:24,477 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2022-12-05 22:06:24,478 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2022-12-05 22:06:24,478 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 266 flow [2022-12-05 22:06:24,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:24,478 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:24,478 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] [2022-12-05 22:06:24,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 22:06:24,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1381259540, now seen corresponding path program 3 times [2022-12-05 22:06:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466166420] [2022-12-05 22:06:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:24,593 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 22:06:24,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:24,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466166420] [2022-12-05 22:06:24,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466166420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:24,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:24,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:24,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767093718] [2022-12-05 22:06:24,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:24,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:24,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:24,595 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:24,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:24,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:24,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:24,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:24,797 INFO L130 PetriNetUnfolder]: 921/1307 cut-off events. [2022-12-05 22:06:24,797 INFO L131 PetriNetUnfolder]: For 2455/2455 co-relation queries the response was YES. [2022-12-05 22:06:24,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4765 conditions, 1307 events. 921/1307 cut-off events. For 2455/2455 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4471 event pairs, 153 based on Foata normal form. 6/1313 useless extension candidates. Maximal degree in co-relation 3197. Up to 1219 conditions per place. [2022-12-05 22:06:24,807 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 47 selfloop transitions, 3 changer transitions 14/64 dead transitions. [2022-12-05 22:06:24,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 453 flow [2022-12-05 22:06:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2022-12-05 22:06:24,809 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.51 [2022-12-05 22:06:24,809 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 266 flow. Second operand 4 states and 51 transitions. [2022-12-05 22:06:24,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 453 flow [2022-12-05 22:06:24,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:06:24,812 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 259 flow [2022-12-05 22:06:24,813 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2022-12-05 22:06:24,813 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2022-12-05 22:06:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 259 flow [2022-12-05 22:06:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:24,814 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:24,814 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] [2022-12-05 22:06:24,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 22:06:24,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1237240061, now seen corresponding path program 2 times [2022-12-05 22:06:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421206035] [2022-12-05 22:06:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:24,993 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 22:06:24,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421206035] [2022-12-05 22:06:24,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421206035] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:24,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:24,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107432982] [2022-12-05 22:06:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:24,995 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:24,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:24,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:24,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:24,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:25,175 INFO L130 PetriNetUnfolder]: 993/1392 cut-off events. [2022-12-05 22:06:25,175 INFO L131 PetriNetUnfolder]: For 3343/3343 co-relation queries the response was YES. [2022-12-05 22:06:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5146 conditions, 1392 events. 993/1392 cut-off events. For 3343/3343 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4748 event pairs, 151 based on Foata normal form. 26/1418 useless extension candidates. Maximal degree in co-relation 3057. Up to 1231 conditions per place. [2022-12-05 22:06:25,187 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 50 selfloop transitions, 4 changer transitions 15/69 dead transitions. [2022-12-05 22:06:25,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 508 flow [2022-12-05 22:06:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2022-12-05 22:06:25,189 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.53 [2022-12-05 22:06:25,189 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 259 flow. Second operand 4 states and 53 transitions. [2022-12-05 22:06:25,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 508 flow [2022-12-05 22:06:25,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 498 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-05 22:06:25,192 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 289 flow [2022-12-05 22:06:25,192 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2022-12-05 22:06:25,193 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2022-12-05 22:06:25,193 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 289 flow [2022-12-05 22:06:25,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:25,194 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:25,194 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] [2022-12-05 22:06:25,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 22:06:25,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1458812427, now seen corresponding path program 3 times [2022-12-05 22:06:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:25,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240360612] [2022-12-05 22:06:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:25,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:25,301 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 22:06:25,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240360612] [2022-12-05 22:06:25,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240360612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:25,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:25,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:25,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004282473] [2022-12-05 22:06:25,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:25,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:25,304 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:25,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:25,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:25,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:25,597 INFO L130 PetriNetUnfolder]: 1595/2234 cut-off events. [2022-12-05 22:06:25,597 INFO L131 PetriNetUnfolder]: For 7943/7943 co-relation queries the response was YES. [2022-12-05 22:06:25,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 2234 events. 1595/2234 cut-off events. For 7943/7943 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8491 event pairs, 126 based on Foata normal form. 54/2288 useless extension candidates. Maximal degree in co-relation 8248. Up to 837 conditions per place. [2022-12-05 22:06:25,620 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 101 selfloop transitions, 10 changer transitions 3/114 dead transitions. [2022-12-05 22:06:25,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 114 transitions, 977 flow [2022-12-05 22:06:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:06:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:06:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-05 22:06:25,623 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.544 [2022-12-05 22:06:25,623 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 289 flow. Second operand 5 states and 68 transitions. [2022-12-05 22:06:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 114 transitions, 977 flow [2022-12-05 22:06:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 114 transitions, 960 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-05 22:06:25,631 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 380 flow [2022-12-05 22:06:25,631 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2022-12-05 22:06:25,632 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2022-12-05 22:06:25,632 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 380 flow [2022-12-05 22:06:25,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:25,633 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:25,633 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] [2022-12-05 22:06:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 22:06:25,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash 640663373, now seen corresponding path program 4 times [2022-12-05 22:06:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53801004] [2022-12-05 22:06:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:25,782 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 22:06:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53801004] [2022-12-05 22:06:25,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53801004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:25,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:25,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:06:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327774208] [2022-12-05 22:06:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:25,784 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:25,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:25,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:25,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:25,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:26,026 INFO L130 PetriNetUnfolder]: 1175/1614 cut-off events. [2022-12-05 22:06:26,026 INFO L131 PetriNetUnfolder]: For 7464/7464 co-relation queries the response was YES. [2022-12-05 22:06:26,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1614 events. 1175/1614 cut-off events. For 7464/7464 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5265 event pairs, 351 based on Foata normal form. 80/1694 useless extension candidates. Maximal degree in co-relation 5945. Up to 1335 conditions per place. [2022-12-05 22:06:26,041 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 56 selfloop transitions, 7 changer transitions 2/65 dead transitions. [2022-12-05 22:06:26,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 543 flow [2022-12-05 22:06:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2022-12-05 22:06:26,043 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46 [2022-12-05 22:06:26,043 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 380 flow. Second operand 4 states and 46 transitions. [2022-12-05 22:06:26,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 543 flow [2022-12-05 22:06:26,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 535 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:26,055 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 330 flow [2022-12-05 22:06:26,055 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-12-05 22:06:26,056 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2022-12-05 22:06:26,057 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 330 flow [2022-12-05 22:06:26,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 22:06:26,057 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:26,057 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] [2022-12-05 22:06:26,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 22:06:26,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash -829252047, now seen corresponding path program 1 times [2022-12-05 22:06:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849699825] [2022-12-05 22:06:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:26,205 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 22:06:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849699825] [2022-12-05 22:06:26,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849699825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362165881] [2022-12-05 22:06:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:26,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:26,208 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 22:06:26,238 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 22:06:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:06:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:26,384 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 22:06:26,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:26,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362165881] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:26,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:06:26,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-05 22:06:26,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523609128] [2022-12-05 22:06:26,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:26,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-05 22:06:26,444 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:26,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 22:06:26,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:26,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:26,753 INFO L130 PetriNetUnfolder]: 1949/2708 cut-off events. [2022-12-05 22:06:26,753 INFO L131 PetriNetUnfolder]: For 10294/10294 co-relation queries the response was YES. [2022-12-05 22:06:26,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12273 conditions, 2708 events. 1949/2708 cut-off events. For 10294/10294 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10524 event pairs, 307 based on Foata normal form. 92/2800 useless extension candidates. Maximal degree in co-relation 8866. Up to 1475 conditions per place. [2022-12-05 22:06:26,779 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2022-12-05 22:06:26,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 97 transitions, 829 flow [2022-12-05 22:06:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2022-12-05 22:06:26,780 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.62 [2022-12-05 22:06:26,780 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 330 flow. Second operand 4 states and 62 transitions. [2022-12-05 22:06:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 97 transitions, 829 flow [2022-12-05 22:06:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 806 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-05 22:06:26,809 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 386 flow [2022-12-05 22:06:26,809 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2022-12-05 22:06:26,810 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2022-12-05 22:06:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 386 flow [2022-12-05 22:06:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 22:06:26,811 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:26,811 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] [2022-12-05 22:06:26,822 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 22:06:27,020 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,SelfDestructingSolverStorable8 [2022-12-05 22:06:27,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash -127048006, now seen corresponding path program 1 times [2022-12-05 22:06:27,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:27,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442790191] [2022-12-05 22:06:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:27,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442790191] [2022-12-05 22:06:27,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442790191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288557140] [2022-12-05 22:06:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:27,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:27,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:27,169 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 22:06:27,202 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 22:06:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:27,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:06:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:27,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288557140] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:27,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:06:27,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2022-12-05 22:06:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818531070] [2022-12-05 22:06:27,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:27,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-05 22:06:27,419 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:27,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:06:27,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:27,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:27,777 INFO L130 PetriNetUnfolder]: 2395/3362 cut-off events. [2022-12-05 22:06:27,777 INFO L131 PetriNetUnfolder]: For 16371/16371 co-relation queries the response was YES. [2022-12-05 22:06:27,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15776 conditions, 3362 events. 2395/3362 cut-off events. For 16371/16371 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13697 event pairs, 351 based on Foata normal form. 146/3508 useless extension candidates. Maximal degree in co-relation 9101. Up to 1555 conditions per place. [2022-12-05 22:06:27,809 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 91 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2022-12-05 22:06:27,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 106 transitions, 998 flow [2022-12-05 22:06:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2022-12-05 22:06:27,810 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.64 [2022-12-05 22:06:27,811 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 386 flow. Second operand 4 states and 64 transitions. [2022-12-05 22:06:27,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 106 transitions, 998 flow [2022-12-05 22:06:27,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 998 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:27,827 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 580 flow [2022-12-05 22:06:27,828 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2022-12-05 22:06:27,828 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-12-05 22:06:27,829 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 580 flow [2022-12-05 22:06:27,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 22:06:27,829 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:27,829 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] [2022-12-05 22:06:27,835 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 22:06:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:28,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1303650102, now seen corresponding path program 2 times [2022-12-05 22:06:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:28,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124162598] [2022-12-05 22:06:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:28,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:06:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124162598] [2022-12-05 22:06:28,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124162598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:06:28,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:06:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 22:06:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788315623] [2022-12-05 22:06:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:06:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:06:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:06:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:06:28,183 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:28,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 580 flow. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:06:28,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:28,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:28,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:28,547 INFO L130 PetriNetUnfolder]: 2261/3130 cut-off events. [2022-12-05 22:06:28,547 INFO L131 PetriNetUnfolder]: For 19801/19801 co-relation queries the response was YES. [2022-12-05 22:06:28,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 3130 events. 2261/3130 cut-off events. For 19801/19801 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11941 event pairs, 756 based on Foata normal form. 14/3144 useless extension candidates. Maximal degree in co-relation 9549. Up to 3013 conditions per place. [2022-12-05 22:06:28,572 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 60 selfloop transitions, 8 changer transitions 7/75 dead transitions. [2022-12-05 22:06:28,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 811 flow [2022-12-05 22:06:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-12-05 22:06:28,573 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-05 22:06:28,573 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 580 flow. Second operand 4 states and 44 transitions. [2022-12-05 22:06:28,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 811 flow [2022-12-05 22:06:28,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 811 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:28,584 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 580 flow [2022-12-05 22:06:28,584 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2022-12-05 22:06:28,584 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2022-12-05 22:06:28,585 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 580 flow [2022-12-05 22:06:28,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:06:28,585 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:28,585 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] [2022-12-05 22:06:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-05 22:06:28,585 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1986419809, now seen corresponding path program 1 times [2022-12-05 22:06:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:28,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739778263] [2022-12-05 22:06:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739778263] [2022-12-05 22:06:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739778263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230091230] [2022-12-05 22:06:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:28,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:28,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:28,719 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 22:06:28,754 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 22:06:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:06:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:28,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:28,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230091230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:28,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:28,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-12-05 22:06:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390324348] [2022-12-05 22:06:28,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:06:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:06:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:06:28,965 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:28,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 580 flow. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 22:06:28,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:28,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:28,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:29,734 INFO L130 PetriNetUnfolder]: 4762/6785 cut-off events. [2022-12-05 22:06:29,734 INFO L131 PetriNetUnfolder]: For 46568/46568 co-relation queries the response was YES. [2022-12-05 22:06:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34704 conditions, 6785 events. 4762/6785 cut-off events. For 46568/46568 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32653 event pairs, 1256 based on Foata normal form. 634/7419 useless extension candidates. Maximal degree in co-relation 21618. Up to 3473 conditions per place. [2022-12-05 22:06:29,785 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 105 selfloop transitions, 38 changer transitions 3/146 dead transitions. [2022-12-05 22:06:29,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 146 transitions, 1688 flow [2022-12-05 22:06:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:06:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:06:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2022-12-05 22:06:29,787 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.71 [2022-12-05 22:06:29,787 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 580 flow. Second operand 4 states and 71 transitions. [2022-12-05 22:06:29,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 146 transitions, 1688 flow [2022-12-05 22:06:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 146 transitions, 1670 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 22:06:29,811 INFO L231 Difference]: Finished difference. Result has 70 places, 92 transitions, 1210 flow [2022-12-05 22:06:29,812 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1210, PETRI_PLACES=70, PETRI_TRANSITIONS=92} [2022-12-05 22:06:29,813 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2022-12-05 22:06:29,813 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 92 transitions, 1210 flow [2022-12-05 22:06:29,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 22:06:29,813 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:29,813 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] [2022-12-05 22:06:29,823 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 22:06:30,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:30,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1754591801, now seen corresponding path program 2 times [2022-12-05 22:06:30,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:30,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540386237] [2022-12-05 22:06:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:30,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:06:30,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:30,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540386237] [2022-12-05 22:06:30,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540386237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:30,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139619157] [2022-12-05 22:06:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:06:30,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:30,208 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 22:06:30,211 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 22:06:30,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:06:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:06:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:06:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:06:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:06:30,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139619157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:30,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-05 22:06:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167162301] [2022-12-05 22:06:30,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:30,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:06:30,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:06:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:06:30,424 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:30,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 92 transitions, 1210 flow. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 22:06:30,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:30,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:31,979 INFO L130 PetriNetUnfolder]: 9386/13396 cut-off events. [2022-12-05 22:06:31,979 INFO L131 PetriNetUnfolder]: For 128672/128672 co-relation queries the response was YES. [2022-12-05 22:06:32,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77392 conditions, 13396 events. 9386/13396 cut-off events. For 128672/128672 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 72764 event pairs, 1928 based on Foata normal form. 691/14087 useless extension candidates. Maximal degree in co-relation 48773. Up to 5627 conditions per place. [2022-12-05 22:06:32,096 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 134 selfloop transitions, 95 changer transitions 3/232 dead transitions. [2022-12-05 22:06:32,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 232 transitions, 3114 flow [2022-12-05 22:06:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:06:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:06:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2022-12-05 22:06:32,098 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.752 [2022-12-05 22:06:32,098 INFO L175 Difference]: Start difference. First operand has 70 places, 92 transitions, 1210 flow. Second operand 5 states and 94 transitions. [2022-12-05 22:06:32,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 232 transitions, 3114 flow [2022-12-05 22:06:32,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 232 transitions, 3066 flow, removed 24 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:32,131 INFO L231 Difference]: Finished difference. Result has 76 places, 149 transitions, 2344 flow [2022-12-05 22:06:32,131 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2344, PETRI_PLACES=76, PETRI_TRANSITIONS=149} [2022-12-05 22:06:32,131 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2022-12-05 22:06:32,131 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 149 transitions, 2344 flow [2022-12-05 22:06:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 22:06:32,132 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:32,132 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:06:32,147 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 22:06:32,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-05 22:06:32,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash 291712536, now seen corresponding path program 3 times [2022-12-05 22:06:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:32,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747345432] [2022-12-05 22:06:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747345432] [2022-12-05 22:06:32,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747345432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297518130] [2022-12-05 22:06:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:06:32,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:32,530 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 22:06:32,557 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 22:06:32,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 22:06:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:06:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:06:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:32,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:32,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297518130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:32,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:32,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 22:06:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956682798] [2022-12-05 22:06:32,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:32,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 22:06:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 22:06:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-05 22:06:32,836 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:32,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 149 transitions, 2344 flow. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 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 22:06:32,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:32,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:32,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:35,862 INFO L130 PetriNetUnfolder]: 20749/29865 cut-off events. [2022-12-05 22:06:35,862 INFO L131 PetriNetUnfolder]: For 324058/324058 co-relation queries the response was YES. [2022-12-05 22:06:35,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180438 conditions, 29865 events. 20749/29865 cut-off events. For 324058/324058 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 186738 event pairs, 2913 based on Foata normal form. 1258/31123 useless extension candidates. Maximal degree in co-relation 110329. Up to 9339 conditions per place. [2022-12-05 22:06:36,119 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 428 selfloop transitions, 125 changer transitions 45/598 dead transitions. [2022-12-05 22:06:36,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 598 transitions, 9429 flow [2022-12-05 22:06:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 22:06:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 22:06:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2022-12-05 22:06:36,121 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5342857142857143 [2022-12-05 22:06:36,121 INFO L175 Difference]: Start difference. First operand has 76 places, 149 transitions, 2344 flow. Second operand 14 states and 187 transitions. [2022-12-05 22:06:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 598 transitions, 9429 flow [2022-12-05 22:06:36,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 598 transitions, 8847 flow, removed 291 selfloop flow, removed 0 redundant places. [2022-12-05 22:06:36,472 INFO L231 Difference]: Finished difference. Result has 93 places, 244 transitions, 3873 flow [2022-12-05 22:06:36,473 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3873, PETRI_PLACES=93, PETRI_TRANSITIONS=244} [2022-12-05 22:06:36,473 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 59 predicate places. [2022-12-05 22:06:36,473 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 244 transitions, 3873 flow [2022-12-05 22:06:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 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 22:06:36,474 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:36,474 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:06:36,480 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 22:06:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:36,680 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1215285533, now seen corresponding path program 4 times [2022-12-05 22:06:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720418091] [2022-12-05 22:06:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:36,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:36,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720418091] [2022-12-05 22:06:36,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720418091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:36,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005824434] [2022-12-05 22:06:36,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:06:36,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:36,871 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 22:06:36,874 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 22:06:36,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:06:36,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:06:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:06:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:37,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:37,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005824434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:37,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:37,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-12-05 22:06:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090190813] [2022-12-05 22:06:37,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:06:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:06:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:06:37,148 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:37,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 244 transitions, 3873 flow. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 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 22:06:37,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:37,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:43,166 INFO L130 PetriNetUnfolder]: 35431/50866 cut-off events. [2022-12-05 22:06:43,166 INFO L131 PetriNetUnfolder]: For 599729/599729 co-relation queries the response was YES. [2022-12-05 22:06:43,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325213 conditions, 50866 events. 35431/50866 cut-off events. For 599729/599729 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 341384 event pairs, 6008 based on Foata normal form. 3984/54850 useless extension candidates. Maximal degree in co-relation 229845. Up to 16028 conditions per place. [2022-12-05 22:06:43,771 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 788 selfloop transitions, 223 changer transitions 17/1028 dead transitions. [2022-12-05 22:06:43,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 1028 transitions, 16835 flow [2022-12-05 22:06:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 22:06:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 22:06:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2022-12-05 22:06:43,774 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6276923076923077 [2022-12-05 22:06:43,774 INFO L175 Difference]: Start difference. First operand has 93 places, 244 transitions, 3873 flow. Second operand 13 states and 204 transitions. [2022-12-05 22:06:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 1028 transitions, 16835 flow [2022-12-05 22:06:44,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 1028 transitions, 15438 flow, removed 631 selfloop flow, removed 4 redundant places. [2022-12-05 22:06:44,967 INFO L231 Difference]: Finished difference. Result has 110 places, 425 transitions, 6750 flow [2022-12-05 22:06:44,967 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6750, PETRI_PLACES=110, PETRI_TRANSITIONS=425} [2022-12-05 22:06:44,968 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 76 predicate places. [2022-12-05 22:06:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 425 transitions, 6750 flow [2022-12-05 22:06:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 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 22:06:44,968 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:44,968 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:06:44,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 22:06:45,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:45,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:06:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1243196865, now seen corresponding path program 5 times [2022-12-05 22:06:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797070672] [2022-12-05 22:06:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:45,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797070672] [2022-12-05 22:06:45,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797070672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817121291] [2022-12-05 22:06:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:06:45,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:45,312 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 22:06:45,339 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 22:06:45,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:06:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:06:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:06:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:06:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817121291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:45,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:45,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-12-05 22:06:45,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769666264] [2022-12-05 22:06:45,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:45,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 22:06:45,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 22:06:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-05 22:06:45,600 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:06:45,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 425 transitions, 6750 flow. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 22:06:45,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:45,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:06:45,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:56,094 INFO L130 PetriNetUnfolder]: 48215/68896 cut-off events. [2022-12-05 22:06:56,094 INFO L131 PetriNetUnfolder]: For 1076186/1076186 co-relation queries the response was YES. [2022-12-05 22:06:56,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483879 conditions, 68896 events. 48215/68896 cut-off events. For 1076186/1076186 co-relation queries the response was YES. Maximal size of possible extension queue 3085. Compared 475929 event pairs, 5494 based on Foata normal form. 3690/72586 useless extension candidates. Maximal degree in co-relation 289445. Up to 26055 conditions per place. [2022-12-05 22:06:56,688 INFO L137 encePairwiseOnDemand]: 18/25 looper letters, 1114 selfloop transitions, 519 changer transitions 14/1647 dead transitions. [2022-12-05 22:06:56,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 1647 transitions, 27912 flow [2022-12-05 22:06:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 22:06:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 22:06:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 419 transitions. [2022-12-05 22:06:56,690 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46555555555555556 [2022-12-05 22:06:56,690 INFO L175 Difference]: Start difference. First operand has 110 places, 425 transitions, 6750 flow. Second operand 36 states and 419 transitions. [2022-12-05 22:06:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 1647 transitions, 27912 flow [2022-12-05 22:07:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 1647 transitions, 27148 flow, removed 342 selfloop flow, removed 2 redundant places. [2022-12-05 22:07:00,631 INFO L231 Difference]: Finished difference. Result has 168 places, 849 transitions, 16462 flow [2022-12-05 22:07:00,631 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16462, PETRI_PLACES=168, PETRI_TRANSITIONS=849} [2022-12-05 22:07:00,632 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 134 predicate places. [2022-12-05 22:07:00,632 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 849 transitions, 16462 flow [2022-12-05 22:07:00,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 22:07:00,632 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:07:00,632 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:07:00,641 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 22:07:00,832 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,SelfDestructingSolverStorable15 [2022-12-05 22:07:00,833 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:07:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:07:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1105788364, now seen corresponding path program 6 times [2022-12-05 22:07:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:07:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597092155] [2022-12-05 22:07:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:07:00,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:07:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:07:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:07:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:07:00,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597092155] [2022-12-05 22:07:00,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597092155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:07:00,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956503297] [2022-12-05 22:07:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:07:00,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:07:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:07:00,978 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 22:07:00,980 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 22:07:01,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:07:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:07:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:07:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:07:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:07:01,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:07:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:07:01,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956503297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:07:01,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:07:01,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-05 22:07:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687491032] [2022-12-05 22:07:01,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:07:01,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:07:01,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:07:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:07:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:07:01,293 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:07:01,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 849 transitions, 16462 flow. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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 22:07:01,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:07:01,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:07:01,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:07:22,197 INFO L130 PetriNetUnfolder]: 67020/94193 cut-off events. [2022-12-05 22:07:22,197 INFO L131 PetriNetUnfolder]: For 3237750/3237750 co-relation queries the response was YES. [2022-12-05 22:07:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831394 conditions, 94193 events. 67020/94193 cut-off events. For 3237750/3237750 co-relation queries the response was YES. Maximal size of possible extension queue 3988. Compared 651106 event pairs, 6304 based on Foata normal form. 6332/100525 useless extension candidates. Maximal degree in co-relation 785232. Up to 30100 conditions per place. [2022-12-05 22:07:23,811 INFO L137 encePairwiseOnDemand]: 18/25 looper letters, 1317 selfloop transitions, 1144 changer transitions 176/2637 dead transitions. [2022-12-05 22:07:23,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 2637 transitions, 52273 flow [2022-12-05 22:07:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-05 22:07:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-05 22:07:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 564 transitions. [2022-12-05 22:07:23,815 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4177777777777778 [2022-12-05 22:07:23,815 INFO L175 Difference]: Start difference. First operand has 168 places, 849 transitions, 16462 flow. Second operand 54 states and 564 transitions. [2022-12-05 22:07:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 2637 transitions, 52273 flow [2022-12-05 22:08:17,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2637 transitions, 47322 flow, removed 2205 selfloop flow, removed 6 redundant places. [2022-12-05 22:08:17,128 INFO L231 Difference]: Finished difference. Result has 246 places, 1744 transitions, 35638 flow [2022-12-05 22:08:17,128 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13408, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=35638, PETRI_PLACES=246, PETRI_TRANSITIONS=1744} [2022-12-05 22:08:17,129 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 212 predicate places. [2022-12-05 22:08:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 1744 transitions, 35638 flow [2022-12-05 22:08:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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 22:08:17,129 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:17,129 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:08:17,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 22:08:17,336 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:08:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash -781500085, now seen corresponding path program 7 times [2022-12-05 22:08:17,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:17,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126948800] [2022-12-05 22:08:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:17,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126948800] [2022-12-05 22:08:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126948800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381425772] [2022-12-05 22:08:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:08:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:17,488 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 22:08:17,493 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 22:08:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:08:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:17,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:08:17,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381425772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:17,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:17,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-12-05 22:08:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098980895] [2022-12-05 22:08:17,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 22:08:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 22:08:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-12-05 22:08:17,765 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:08:17,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 1744 transitions, 35638 flow. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 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 22:08:17,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:17,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:08:17,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:50,674 INFO L130 PetriNetUnfolder]: 66954/94397 cut-off events. [2022-12-05 22:08:50,675 INFO L131 PetriNetUnfolder]: For 3769958/3769958 co-relation queries the response was YES. [2022-12-05 22:08:52,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870923 conditions, 94397 events. 66954/94397 cut-off events. For 3769958/3769958 co-relation queries the response was YES. Maximal size of possible extension queue 4032. Compared 655499 event pairs, 8500 based on Foata normal form. 2340/96737 useless extension candidates. Maximal degree in co-relation 855795. Up to 31938 conditions per place. [2022-12-05 22:08:52,870 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 1645 selfloop transitions, 703 changer transitions 17/2365 dead transitions. [2022-12-05 22:08:52,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 2365 transitions, 52670 flow [2022-12-05 22:08:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 22:08:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 22:08:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 166 transitions. [2022-12-05 22:08:52,872 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2022-12-05 22:08:52,872 INFO L175 Difference]: Start difference. First operand has 246 places, 1744 transitions, 35638 flow. Second operand 12 states and 166 transitions. [2022-12-05 22:08:52,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 2365 transitions, 52670 flow [2022-12-05 22:10:49,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 2365 transitions, 43773 flow, removed 3511 selfloop flow, removed 23 redundant places. [2022-12-05 22:10:49,876 INFO L231 Difference]: Finished difference. Result has 229 places, 1824 transitions, 31751 flow [2022-12-05 22:10:49,877 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=27470, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=31751, PETRI_PLACES=229, PETRI_TRANSITIONS=1824} [2022-12-05 22:10:49,877 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 195 predicate places. [2022-12-05 22:10:49,877 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 1824 transitions, 31751 flow [2022-12-05 22:10:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 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 22:10:49,878 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:10:49,878 INFO L213 CegarLoopForPetriNet]: trace histogram [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] [2022-12-05 22:10:49,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-05 22:10:50,083 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,SelfDestructingSolverStorable17 [2022-12-05 22:10:50,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-05 22:10:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:10:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash -33374395, now seen corresponding path program 8 times [2022-12-05 22:10:50,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:10:50,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402837376] [2022-12-05 22:10:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:10:50,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:10:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:10:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:10:50,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:10:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402837376] [2022-12-05 22:10:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402837376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:10:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550043150] [2022-12-05 22:10:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:10:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:10:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:10:50,241 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 22:10:50,244 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 22:10:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:10:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:10:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:10:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:10:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:10:50,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:10:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 22:10:50,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550043150] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:10:50,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:10:50,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-12-05 22:10:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846863373] [2022-12-05 22:10:50,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:10:50,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 22:10:50,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:10:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 22:10:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-05 22:10:50,558 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 22:10:50,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 1824 transitions, 31751 flow. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 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 22:10:50,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:10:50,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 22:10:50,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand