/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-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:46:08,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:46:08,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:46:08,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:46:08,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:46:08,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:46:08,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:46:08,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:46:08,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:46:08,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:46:08,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:46:08,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:46:08,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:46:08,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:46:08,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:46:08,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:46:08,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:46:08,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:46:08,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:46:08,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:46:08,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:46:08,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:46:08,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:46:08,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:46:08,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:46:08,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:46:08,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:46:08,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:46:08,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:46:08,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:46:08,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:46:08,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:46:08,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:46:08,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:46:08,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:46:08,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:46:08,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:46:08,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:46:08,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:46:08,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:46:08,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:46:08,862 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 21:46:08,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:46:08,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:46:08,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:46:08,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:46:08,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:46:08,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:46:08,890 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:46:08,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:46:08,890 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:46:08,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:46:08,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:46:08,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:46:08,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:46:08,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:46:08,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:46:08,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:46:08,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:46:08,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:46:08,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:46:09,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:46:09,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:46:09,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:46:09,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:46:09,167 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:46:09,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-05 21:46:10,249 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:46:10,409 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:46:10,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-05 21:46:10,414 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c8575b1/d8609dd6c6124d8ca1562931968d2612/FLAGdec84fc14 [2022-12-05 21:46:10,424 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c8575b1/d8609dd6c6124d8ca1562931968d2612 [2022-12-05 21:46:10,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:46:10,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:46:10,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:46:10,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:46:10,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:46:10,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b587eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10, skipping insertion in model container [2022-12-05 21:46:10,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:46:10,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:46:10,560 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,570 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,572 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,589 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,589 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,589 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-05 21:46:10,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:46:10,620 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:46:10,631 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:46:10,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:46:10,662 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-05 21:46:10,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:46:10,676 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:46:10,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10 WrapperNode [2022-12-05 21:46:10,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:46:10,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:46:10,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:46:10,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:46:10,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,723 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 303 [2022-12-05 21:46:10,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:46:10,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:46:10,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:46:10,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:46:10,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:46:10,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:46:10,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:46:10,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:46:10,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (1/1) ... [2022-12-05 21:46:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:46:10,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:46:10,788 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 21:46:10,790 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 21:46:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:46:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:46:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:46:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:46:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:46:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-05 21:46:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:46:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:46:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:46:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:46:10,824 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 21:46:10,923 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:46:10,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:46:11,273 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:46:11,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:46:11,359 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-05 21:46:11,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:46:11 BoogieIcfgContainer [2022-12-05 21:46:11,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:46:11,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:46:11,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:46:11,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:46:11,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:46:10" (1/3) ... [2022-12-05 21:46:11,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4877eb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:46:11, skipping insertion in model container [2022-12-05 21:46:11,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:46:10" (2/3) ... [2022-12-05 21:46:11,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4877eb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:46:11, skipping insertion in model container [2022-12-05 21:46:11,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:46:11" (3/3) ... [2022-12-05 21:46:11,366 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2022-12-05 21:46:11,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:46:11,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:46:11,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:46:11,435 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-05 21:46:11,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 212 transitions, 456 flow [2022-12-05 21:46:11,567 INFO L130 PetriNetUnfolder]: 18/208 cut-off events. [2022-12-05 21:46:11,567 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:46:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 208 events. 18/208 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 106 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-12-05 21:46:11,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 212 transitions, 456 flow [2022-12-05 21:46:11,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 196 transitions, 416 flow [2022-12-05 21:46:11,581 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:46:11,597 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 196 transitions, 416 flow [2022-12-05 21:46:11,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 416 flow [2022-12-05 21:46:11,642 INFO L130 PetriNetUnfolder]: 18/196 cut-off events. [2022-12-05 21:46:11,642 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:46:11,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 196 events. 18/196 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 106 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-12-05 21:46:11,646 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 196 transitions, 416 flow [2022-12-05 21:46:11,646 INFO L188 LiptonReduction]: Number of co-enabled transitions 1824 [2022-12-05 21:46:20,455 INFO L203 LiptonReduction]: Total number of compositions: 161 [2022-12-05 21:46:20,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:46:20,472 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;@75c7c4d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:46:20,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-05 21:46:20,477 INFO L130 PetriNetUnfolder]: 6/34 cut-off events. [2022-12-05 21:46:20,477 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:46:20,477 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:20,478 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, 1, 1, 1, 1, 1] [2022-12-05 21:46:20,478 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 21:46:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash 5856101, now seen corresponding path program 1 times [2022-12-05 21:46:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:20,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889911845] [2022-12-05 21:46:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:20,988 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 21:46:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:20,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889911845] [2022-12-05 21:46:20,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889911845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:20,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:20,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 21:46:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082115727] [2022-12-05 21:46:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:20,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:46:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:21,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:46:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:46:21,024 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2022-12-05 21:46:21,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 21:46:21,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:21,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2022-12-05 21:46:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:21,262 INFO L130 PetriNetUnfolder]: 1619/2220 cut-off events. [2022-12-05 21:46:21,263 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2022-12-05 21:46:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 2220 events. 1619/2220 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8975 event pairs, 272 based on Foata normal form. 1/1329 useless extension candidates. Maximal degree in co-relation 3420. Up to 1413 conditions per place. [2022-12-05 21:46:21,277 INFO L137 encePairwiseOnDemand]: 31/35 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2022-12-05 21:46:21,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2022-12-05 21:46:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:46:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:46:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2022-12-05 21:46:21,304 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2022-12-05 21:46:21,305 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 66 transitions. [2022-12-05 21:46:21,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2022-12-05 21:46:21,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-05 21:46:21,311 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2022-12-05 21:46:21,313 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-12-05 21:46:21,316 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2022-12-05 21:46:21,316 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2022-12-05 21:46:21,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 21:46:21,316 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:21,317 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:21,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:46:21,317 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 21:46:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 233603636, now seen corresponding path program 1 times [2022-12-05 21:46:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736101709] [2022-12-05 21:46:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:21,450 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 21:46:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736101709] [2022-12-05 21:46:21,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736101709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:21,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:21,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:46:21,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736386878] [2022-12-05 21:46:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:46:21,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:46:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:46:21,453 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2022-12-05 21:46:21,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 21:46:21,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:21,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2022-12-05 21:46:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:21,722 INFO L130 PetriNetUnfolder]: 2187/2884 cut-off events. [2022-12-05 21:46:21,722 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-12-05 21:46:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6424 conditions, 2884 events. 2187/2884 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11848 event pairs, 596 based on Foata normal form. 76/2326 useless extension candidates. Maximal degree in co-relation 2213. Up to 1820 conditions per place. [2022-12-05 21:46:21,735 INFO L137 encePairwiseOnDemand]: 32/35 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-12-05 21:46:21,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 264 flow [2022-12-05 21:46:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:46:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:46:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2022-12-05 21:46:21,737 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2022-12-05 21:46:21,738 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 65 transitions. [2022-12-05 21:46:21,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 264 flow [2022-12-05 21:46:21,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:46:21,740 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2022-12-05 21:46:21,740 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-05 21:46:21,741 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-12-05 21:46:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2022-12-05 21:46:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 21:46:21,741 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:21,741 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:46:21,741 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 21:46:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash -85437150, now seen corresponding path program 1 times [2022-12-05 21:46:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276658656] [2022-12-05 21:46:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:21,828 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 21:46:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276658656] [2022-12-05 21:46:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276658656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:21,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:46:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431576832] [2022-12-05 21:46:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:21,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:46:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:46:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:46:21,832 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2022-12-05 21:46:21,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 21:46:21,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:21,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2022-12-05 21:46:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:22,110 INFO L130 PetriNetUnfolder]: 2417/3341 cut-off events. [2022-12-05 21:46:22,110 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2022-12-05 21:46:22,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 3341 events. 2417/3341 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15290 event pairs, 747 based on Foata normal form. 100/3098 useless extension candidates. Maximal degree in co-relation 3824. Up to 2227 conditions per place. [2022-12-05 21:46:22,122 INFO L137 encePairwiseOnDemand]: 32/35 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-12-05 21:46:22,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 298 flow [2022-12-05 21:46:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:46:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:46:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2022-12-05 21:46:22,123 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2022-12-05 21:46:22,123 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 67 transitions. [2022-12-05 21:46:22,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 298 flow [2022-12-05 21:46:22,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:46:22,125 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2022-12-05 21:46:22,125 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2022-12-05 21:46:22,125 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2022-12-05 21:46:22,126 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2022-12-05 21:46:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 21:46:22,126 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:22,126 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:46:22,126 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 21:46:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash -547150371, now seen corresponding path program 1 times [2022-12-05 21:46:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:22,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825273542] [2022-12-05 21:46:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:22,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:22,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825273542] [2022-12-05 21:46:22,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825273542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:22,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:22,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:46:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316193636] [2022-12-05 21:46:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:22,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:46:22,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:46:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:46:22,222 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2022-12-05 21:46:22,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:46:22,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:22,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2022-12-05 21:46:22,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:22,512 INFO L130 PetriNetUnfolder]: 2112/3126 cut-off events. [2022-12-05 21:46:22,512 INFO L131 PetriNetUnfolder]: For 1778/1778 co-relation queries the response was YES. [2022-12-05 21:46:22,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 3126 events. 2112/3126 cut-off events. For 1778/1778 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16337 event pairs, 1532 based on Foata normal form. 103/3139 useless extension candidates. Maximal degree in co-relation 3812. Up to 2237 conditions per place. [2022-12-05 21:46:22,526 INFO L137 encePairwiseOnDemand]: 31/35 looper letters, 56 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2022-12-05 21:46:22,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 313 flow [2022-12-05 21:46:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:46:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:46:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2022-12-05 21:46:22,527 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2022-12-05 21:46:22,527 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 78 transitions. [2022-12-05 21:46:22,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 313 flow [2022-12-05 21:46:22,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:46:22,529 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2022-12-05 21:46:22,529 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-05 21:46:22,529 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-12-05 21:46:22,530 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2022-12-05 21:46:22,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:46:22,530 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:22,530 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:46:22,530 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 21:46:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1165105401, now seen corresponding path program 1 times [2022-12-05 21:46:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:22,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708848543] [2022-12-05 21:46:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708848543] [2022-12-05 21:46:22,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708848543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:22,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:22,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:46:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992210017] [2022-12-05 21:46:22,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:46:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:46:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:46:22,622 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2022-12-05 21:46:22,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:46:22,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:22,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2022-12-05 21:46:22,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:22,973 INFO L130 PetriNetUnfolder]: 2699/4094 cut-off events. [2022-12-05 21:46:22,974 INFO L131 PetriNetUnfolder]: For 2330/2330 co-relation queries the response was YES. [2022-12-05 21:46:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 4094 events. 2699/4094 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23337 event pairs, 2028 based on Foata normal form. 103/4118 useless extension candidates. Maximal degree in co-relation 5833. Up to 2990 conditions per place. [2022-12-05 21:46:22,989 INFO L137 encePairwiseOnDemand]: 30/35 looper letters, 60 selfloop transitions, 4 changer transitions 20/90 dead transitions. [2022-12-05 21:46:22,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 90 transitions, 450 flow [2022-12-05 21:46:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:46:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:46:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2022-12-05 21:46:22,991 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6171428571428571 [2022-12-05 21:46:22,991 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 5 states and 108 transitions. [2022-12-05 21:46:22,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 90 transitions, 450 flow [2022-12-05 21:46:22,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 90 transitions, 442 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-05 21:46:22,993 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 166 flow [2022-12-05 21:46:22,993 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2022-12-05 21:46:22,994 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2022-12-05 21:46:22,994 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 166 flow [2022-12-05 21:46:22,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:46:22,994 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:22,994 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 21:46:22,994 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 21:46:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash -166777944, now seen corresponding path program 1 times [2022-12-05 21:46:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473487474] [2022-12-05 21:46:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:23,286 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 21:46:23,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473487474] [2022-12-05 21:46:23,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473487474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:23,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:23,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:46:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505436543] [2022-12-05 21:46:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:46:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:46:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:46:23,288 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:23,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:23,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:23,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:23,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:24,305 INFO L130 PetriNetUnfolder]: 9921/14190 cut-off events. [2022-12-05 21:46:24,305 INFO L131 PetriNetUnfolder]: For 4738/4738 co-relation queries the response was YES. [2022-12-05 21:46:24,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32841 conditions, 14190 events. 9921/14190 cut-off events. For 4738/4738 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 76803 event pairs, 1684 based on Foata normal form. 248/14436 useless extension candidates. Maximal degree in co-relation 23027. Up to 8084 conditions per place. [2022-12-05 21:46:24,364 INFO L137 encePairwiseOnDemand]: 29/35 looper letters, 100 selfloop transitions, 7 changer transitions 27/134 dead transitions. [2022-12-05 21:46:24,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 134 transitions, 667 flow [2022-12-05 21:46:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:46:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:46:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2022-12-05 21:46:24,366 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2022-12-05 21:46:24,366 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 166 flow. Second operand 7 states and 126 transitions. [2022-12-05 21:46:24,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 134 transitions, 667 flow [2022-12-05 21:46:24,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 134 transitions, 663 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:46:24,372 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 228 flow [2022-12-05 21:46:24,372 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2022-12-05 21:46:24,374 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2022-12-05 21:46:24,374 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 228 flow [2022-12-05 21:46:24,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:24,375 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:24,375 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:24,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 21:46:24,375 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 21:46:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash 930125104, now seen corresponding path program 2 times [2022-12-05 21:46:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:24,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919782543] [2022-12-05 21:46:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:24,822 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 21:46:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919782543] [2022-12-05 21:46:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919782543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:24,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:24,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 21:46:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631125521] [2022-12-05 21:46:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:24,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:46:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:46:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:46:24,824 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:24,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:24,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:24,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:26,469 INFO L130 PetriNetUnfolder]: 13111/18975 cut-off events. [2022-12-05 21:46:26,469 INFO L131 PetriNetUnfolder]: For 16072/16072 co-relation queries the response was YES. [2022-12-05 21:46:26,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49589 conditions, 18975 events. 13111/18975 cut-off events. For 16072/16072 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 111014 event pairs, 1596 based on Foata normal form. 230/19203 useless extension candidates. Maximal degree in co-relation 42186. Up to 5180 conditions per place. [2022-12-05 21:46:26,559 INFO L137 encePairwiseOnDemand]: 28/35 looper letters, 174 selfloop transitions, 18 changer transitions 8/200 dead transitions. [2022-12-05 21:46:26,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 200 transitions, 1190 flow [2022-12-05 21:46:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:46:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:46:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2022-12-05 21:46:26,561 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.526984126984127 [2022-12-05 21:46:26,562 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 228 flow. Second operand 9 states and 166 transitions. [2022-12-05 21:46:26,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 200 transitions, 1190 flow [2022-12-05 21:46:26,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 200 transitions, 1178 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-05 21:46:26,590 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 410 flow [2022-12-05 21:46:26,590 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2022-12-05 21:46:26,590 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2022-12-05 21:46:26,591 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 410 flow [2022-12-05 21:46:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:26,591 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:26,591 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 21:46:26,591 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 21:46:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash -424020748, now seen corresponding path program 3 times [2022-12-05 21:46:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480449208] [2022-12-05 21:46:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:26,898 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 21:46:26,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480449208] [2022-12-05 21:46:26,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480449208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:26,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:26,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:46:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388176762] [2022-12-05 21:46:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:46:26,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:26,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:46:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:46:26,902 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:26,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:26,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:26,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:26,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:28,887 INFO L130 PetriNetUnfolder]: 15089/22013 cut-off events. [2022-12-05 21:46:28,888 INFO L131 PetriNetUnfolder]: For 37338/37338 co-relation queries the response was YES. [2022-12-05 21:46:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71162 conditions, 22013 events. 15089/22013 cut-off events. For 37338/37338 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 131525 event pairs, 3306 based on Foata normal form. 82/22093 useless extension candidates. Maximal degree in co-relation 61107. Up to 13865 conditions per place. [2022-12-05 21:46:28,980 INFO L137 encePairwiseOnDemand]: 28/35 looper letters, 110 selfloop transitions, 27 changer transitions 57/194 dead transitions. [2022-12-05 21:46:28,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 194 transitions, 1366 flow [2022-12-05 21:46:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:46:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:46:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2022-12-05 21:46:28,982 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2022-12-05 21:46:28,982 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 410 flow. Second operand 9 states and 156 transitions. [2022-12-05 21:46:28,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 194 transitions, 1366 flow [2022-12-05 21:46:29,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 194 transitions, 1336 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 21:46:29,254 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 667 flow [2022-12-05 21:46:29,254 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=667, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2022-12-05 21:46:29,254 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2022-12-05 21:46:29,254 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 667 flow [2022-12-05 21:46:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:29,255 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:29,255 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 21:46:29,255 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 21:46:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1737324720, now seen corresponding path program 4 times [2022-12-05 21:46:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420473261] [2022-12-05 21:46:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:29,528 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 21:46:29,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420473261] [2022-12-05 21:46:29,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420473261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:29,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:29,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:46:29,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708674953] [2022-12-05 21:46:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:29,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:46:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:46:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:46:29,533 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:29,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:29,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:29,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:29,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:32,235 INFO L130 PetriNetUnfolder]: 19585/28593 cut-off events. [2022-12-05 21:46:32,236 INFO L131 PetriNetUnfolder]: For 75547/75547 co-relation queries the response was YES. [2022-12-05 21:46:32,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101667 conditions, 28593 events. 19585/28593 cut-off events. For 75547/75547 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 178905 event pairs, 3920 based on Foata normal form. 540/29131 useless extension candidates. Maximal degree in co-relation 96983. Up to 14141 conditions per place. [2022-12-05 21:46:32,394 INFO L137 encePairwiseOnDemand]: 29/35 looper letters, 200 selfloop transitions, 44 changer transitions 9/253 dead transitions. [2022-12-05 21:46:32,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 253 transitions, 2113 flow [2022-12-05 21:46:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:46:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:46:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2022-12-05 21:46:32,396 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.526984126984127 [2022-12-05 21:46:32,396 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 667 flow. Second operand 9 states and 166 transitions. [2022-12-05 21:46:32,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 253 transitions, 2113 flow [2022-12-05 21:46:33,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 253 transitions, 2077 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-12-05 21:46:33,044 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 1078 flow [2022-12-05 21:46:33,045 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1078, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2022-12-05 21:46:33,045 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2022-12-05 21:46:33,045 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 1078 flow [2022-12-05 21:46:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:33,046 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:33,046 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:33,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-05 21:46:33,046 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 21:46:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1719522838, now seen corresponding path program 5 times [2022-12-05 21:46:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:33,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705231437] [2022-12-05 21:46:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:33,293 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 21:46:33,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705231437] [2022-12-05 21:46:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705231437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:33,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:46:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646679780] [2022-12-05 21:46:33,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:46:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:46:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:46:33,294 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:33,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 1078 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:33,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:33,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:33,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:37,117 INFO L130 PetriNetUnfolder]: 27289/39846 cut-off events. [2022-12-05 21:46:37,117 INFO L131 PetriNetUnfolder]: For 120675/120675 co-relation queries the response was YES. [2022-12-05 21:46:37,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146267 conditions, 39846 events. 27289/39846 cut-off events. For 120675/120675 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 261025 event pairs, 5538 based on Foata normal form. 342/40186 useless extension candidates. Maximal degree in co-relation 139863. Up to 17101 conditions per place. [2022-12-05 21:46:37,424 INFO L137 encePairwiseOnDemand]: 27/35 looper letters, 218 selfloop transitions, 72 changer transitions 12/302 dead transitions. [2022-12-05 21:46:37,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 302 transitions, 2850 flow [2022-12-05 21:46:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:46:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:46:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2022-12-05 21:46:37,425 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2022-12-05 21:46:37,426 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 1078 flow. Second operand 10 states and 179 transitions. [2022-12-05 21:46:37,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 302 transitions, 2850 flow [2022-12-05 21:46:38,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 302 transitions, 2582 flow, removed 115 selfloop flow, removed 2 redundant places. [2022-12-05 21:46:38,885 INFO L231 Difference]: Finished difference. Result has 110 places, 148 transitions, 1625 flow [2022-12-05 21:46:38,886 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1625, PETRI_PLACES=110, PETRI_TRANSITIONS=148} [2022-12-05 21:46:38,887 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2022-12-05 21:46:38,887 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 148 transitions, 1625 flow [2022-12-05 21:46:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:38,887 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:38,887 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:38,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-05 21:46:38,887 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 21:46:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1194104980, now seen corresponding path program 6 times [2022-12-05 21:46:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876066051] [2022-12-05 21:46:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:39,185 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 21:46:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876066051] [2022-12-05 21:46:39,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876066051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:39,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:46:39,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 21:46:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485616936] [2022-12-05 21:46:39,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:46:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:46:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:46:39,187 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:39,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 148 transitions, 1625 flow. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:39,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:39,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:39,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:43,097 INFO L130 PetriNetUnfolder]: 27165/39602 cut-off events. [2022-12-05 21:46:43,097 INFO L131 PetriNetUnfolder]: For 189777/189777 co-relation queries the response was YES. [2022-12-05 21:46:43,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161954 conditions, 39602 events. 27165/39602 cut-off events. For 189777/189777 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 259275 event pairs, 5654 based on Foata normal form. 352/39952 useless extension candidates. Maximal degree in co-relation 143431. Up to 15426 conditions per place. [2022-12-05 21:46:43,374 INFO L137 encePairwiseOnDemand]: 29/35 looper letters, 185 selfloop transitions, 69 changer transitions 7/261 dead transitions. [2022-12-05 21:46:43,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 261 transitions, 2899 flow [2022-12-05 21:46:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:46:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:46:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2022-12-05 21:46:43,383 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-05 21:46:43,383 INFO L175 Difference]: Start difference. First operand has 110 places, 148 transitions, 1625 flow. Second operand 6 states and 110 transitions. [2022-12-05 21:46:43,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 261 transitions, 2899 flow [2022-12-05 21:46:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 261 transitions, 2737 flow, removed 61 selfloop flow, removed 4 redundant places. [2022-12-05 21:46:44,843 INFO L231 Difference]: Finished difference. Result has 112 places, 159 transitions, 1818 flow [2022-12-05 21:46:44,843 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1818, PETRI_PLACES=112, PETRI_TRANSITIONS=159} [2022-12-05 21:46:44,843 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2022-12-05 21:46:44,844 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 159 transitions, 1818 flow [2022-12-05 21:46:44,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:44,844 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:44,844 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-05 21:46:44,844 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 21:46:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 735514926, now seen corresponding path program 7 times [2022-12-05 21:46:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:44,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78629681] [2022-12-05 21:46:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:44,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:45,240 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 21:46:45,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:45,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78629681] [2022-12-05 21:46:45,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78629681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:46:45,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63379654] [2022-12-05 21:46:45,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:46:45,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:46:45,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:46:45,243 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 21:46:45,248 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 21:46:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 21:46:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:46:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:45,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:46:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63379654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:46:45,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:46:45,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2022-12-05 21:46:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975791256] [2022-12-05 21:46:45,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:46:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:46:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:46:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:46:45,872 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:45,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 159 transitions, 1818 flow. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 21:46:45,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:45,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:45,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:46:53,864 INFO L130 PetriNetUnfolder]: 41977/62931 cut-off events. [2022-12-05 21:46:53,865 INFO L131 PetriNetUnfolder]: For 296356/296356 co-relation queries the response was YES. [2022-12-05 21:46:54,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261612 conditions, 62931 events. 41977/62931 cut-off events. For 296356/296356 co-relation queries the response was YES. Maximal size of possible extension queue 2391. Compared 461467 event pairs, 8438 based on Foata normal form. 1780/64709 useless extension candidates. Maximal degree in co-relation 224224. Up to 22557 conditions per place. [2022-12-05 21:46:54,494 INFO L137 encePairwiseOnDemand]: 24/35 looper letters, 667 selfloop transitions, 293 changer transitions 54/1014 dead transitions. [2022-12-05 21:46:54,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 1014 transitions, 12447 flow [2022-12-05 21:46:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 21:46:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 21:46:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 380 transitions. [2022-12-05 21:46:54,496 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2022-12-05 21:46:54,496 INFO L175 Difference]: Start difference. First operand has 112 places, 159 transitions, 1818 flow. Second operand 30 states and 380 transitions. [2022-12-05 21:46:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 1014 transitions, 12447 flow [2022-12-05 21:46:57,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 1014 transitions, 11847 flow, removed 72 selfloop flow, removed 7 redundant places. [2022-12-05 21:46:57,452 INFO L231 Difference]: Finished difference. Result has 148 places, 458 transitions, 6545 flow [2022-12-05 21:46:57,452 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6545, PETRI_PLACES=148, PETRI_TRANSITIONS=458} [2022-12-05 21:46:57,453 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2022-12-05 21:46:57,453 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 458 transitions, 6545 flow [2022-12-05 21:46:57,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 21:46:57,453 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:57,453 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:46:57,474 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 21:46:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-05 21:46:57,658 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 21:46:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1474551244, now seen corresponding path program 8 times [2022-12-05 21:46:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:57,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531952511] [2022-12-05 21:46:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:57,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531952511] [2022-12-05 21:46:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531952511] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:46:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389072198] [2022-12-05 21:46:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:46:57,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:46:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:46:57,936 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 21:46:57,938 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 21:46:58,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:46:58,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:46:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:46:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:46:58,203 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 21:46:58,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:46:58,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389072198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:46:58,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:46:58,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-05 21:46:58,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44581960] [2022-12-05 21:46:58,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:46:58,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:46:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:46:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:46:58,205 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:46:58,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 458 transitions, 6545 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:46:58,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:58,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:46:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:47:04,732 INFO L130 PetriNetUnfolder]: 30823/45759 cut-off events. [2022-12-05 21:47:04,733 INFO L131 PetriNetUnfolder]: For 358859/358859 co-relation queries the response was YES. [2022-12-05 21:47:05,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230835 conditions, 45759 events. 30823/45759 cut-off events. For 358859/358859 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 313301 event pairs, 11768 based on Foata normal form. 1640/47397 useless extension candidates. Maximal degree in co-relation 218630. Up to 38647 conditions per place. [2022-12-05 21:47:05,371 INFO L137 encePairwiseOnDemand]: 29/35 looper letters, 247 selfloop transitions, 254 changer transitions 0/501 dead transitions. [2022-12-05 21:47:05,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 501 transitions, 7800 flow [2022-12-05 21:47:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:47:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:47:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2022-12-05 21:47:05,373 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2022-12-05 21:47:05,373 INFO L175 Difference]: Start difference. First operand has 148 places, 458 transitions, 6545 flow. Second operand 6 states and 86 transitions. [2022-12-05 21:47:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 501 transitions, 7800 flow [2022-12-05 21:47:09,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 501 transitions, 7579 flow, removed 29 selfloop flow, removed 5 redundant places. [2022-12-05 21:47:09,687 INFO L231 Difference]: Finished difference. Result has 146 places, 446 transitions, 6718 flow [2022-12-05 21:47:09,688 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6718, PETRI_PLACES=146, PETRI_TRANSITIONS=446} [2022-12-05 21:47:09,689 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2022-12-05 21:47:09,689 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 446 transitions, 6718 flow [2022-12-05 21:47:09,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:47:09,689 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:47:09,689 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:47:09,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:47:09,894 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,SelfDestructingSolverStorable12 [2022-12-05 21:47:09,894 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 21:47:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:47:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -723738062, now seen corresponding path program 9 times [2022-12-05 21:47:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:47:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889436655] [2022-12-05 21:47:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:47:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:47:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:47:10,114 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 21:47:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:47:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889436655] [2022-12-05 21:47:10,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889436655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:47:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648357931] [2022-12-05 21:47:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:47:10,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:47:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:47:10,116 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 21:47:10,117 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 21:47:10,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:47:10,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:47:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 21:47:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:47:10,412 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 21:47:10,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:47:10,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648357931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:47:10,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:47:10,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-05 21:47:10,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517417615] [2022-12-05 21:47:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:47:10,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:47:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:47:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:47:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:47:10,413 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:47:10,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 446 transitions, 6718 flow. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:47:10,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:47:10,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:47:10,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:47:19,822 INFO L130 PetriNetUnfolder]: 45413/68165 cut-off events. [2022-12-05 21:47:19,822 INFO L131 PetriNetUnfolder]: For 493803/493803 co-relation queries the response was YES. [2022-12-05 21:47:20,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340326 conditions, 68165 events. 45413/68165 cut-off events. For 493803/493803 co-relation queries the response was YES. Maximal size of possible extension queue 2903. Compared 507416 event pairs, 14858 based on Foata normal form. 384/68547 useless extension candidates. Maximal degree in co-relation 328042. Up to 36920 conditions per place. [2022-12-05 21:47:20,780 INFO L137 encePairwiseOnDemand]: 25/35 looper letters, 493 selfloop transitions, 454 changer transitions 82/1029 dead transitions. [2022-12-05 21:47:20,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1029 transitions, 16152 flow [2022-12-05 21:47:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:47:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:47:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 193 transitions. [2022-12-05 21:47:20,783 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39387755102040817 [2022-12-05 21:47:20,786 INFO L175 Difference]: Start difference. First operand has 146 places, 446 transitions, 6718 flow. Second operand 14 states and 193 transitions. [2022-12-05 21:47:20,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1029 transitions, 16152 flow [2022-12-05 21:47:29,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 1029 transitions, 15740 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 21:47:29,526 INFO L231 Difference]: Finished difference. Result has 164 places, 744 transitions, 12563 flow [2022-12-05 21:47:29,526 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12563, PETRI_PLACES=164, PETRI_TRANSITIONS=744} [2022-12-05 21:47:29,527 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2022-12-05 21:47:29,527 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 744 transitions, 12563 flow [2022-12-05 21:47:29,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:47:29,527 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:47:29,527 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:47:29,532 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 21:47:29,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:47:29,732 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 21:47:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:47:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1716243384, now seen corresponding path program 10 times [2022-12-05 21:47:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:47:29,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690261086] [2022-12-05 21:47:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:47:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:47:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:47:29,922 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 21:47:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:47:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690261086] [2022-12-05 21:47:29,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690261086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:47:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362478295] [2022-12-05 21:47:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:47:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:47:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:47:29,941 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 21:47:29,942 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 21:47:30,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:47:30,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:47:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 21:47:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:47:30,150 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 21:47:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:47:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:47:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362478295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:47:30,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:47:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2022-12-05 21:47:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18204475] [2022-12-05 21:47:30,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:47:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:47:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:47:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:47:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:47:30,243 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:47:30,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 744 transitions, 12563 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 21:47:30,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:47:30,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:47:30,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:47:44,182 INFO L130 PetriNetUnfolder]: 48577/74913 cut-off events. [2022-12-05 21:47:44,182 INFO L131 PetriNetUnfolder]: For 666810/666810 co-relation queries the response was YES. [2022-12-05 21:47:45,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411682 conditions, 74913 events. 48577/74913 cut-off events. For 666810/666810 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 594387 event pairs, 8955 based on Foata normal form. 1104/76015 useless extension candidates. Maximal degree in co-relation 398879. Up to 20888 conditions per place. [2022-12-05 21:47:45,300 INFO L137 encePairwiseOnDemand]: 26/35 looper letters, 363 selfloop transitions, 737 changer transitions 8/1108 dead transitions. [2022-12-05 21:47:45,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 1108 transitions, 19139 flow [2022-12-05 21:47:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:47:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:47:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 178 transitions. [2022-12-05 21:47:45,301 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3912087912087912 [2022-12-05 21:47:45,301 INFO L175 Difference]: Start difference. First operand has 164 places, 744 transitions, 12563 flow. Second operand 13 states and 178 transitions. [2022-12-05 21:47:45,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 1108 transitions, 19139 flow [2022-12-05 21:47:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1108 transitions, 19057 flow, removed 41 selfloop flow, removed 1 redundant places. [2022-12-05 21:47:57,635 INFO L231 Difference]: Finished difference. Result has 182 places, 890 transitions, 17474 flow [2022-12-05 21:47:57,635 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12529, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17474, PETRI_PLACES=182, PETRI_TRANSITIONS=890} [2022-12-05 21:47:57,636 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2022-12-05 21:47:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 890 transitions, 17474 flow [2022-12-05 21:47:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 21:47:57,636 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:47:57,636 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:47:57,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 21:47:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 21:47:57,841 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 21:47:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:47:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1001586072, now seen corresponding path program 1 times [2022-12-05 21:47:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:47:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623272675] [2022-12-05 21:47:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:47:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:47:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:47:58,031 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 21:47:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:47:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623272675] [2022-12-05 21:47:58,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623272675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:47:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205237289] [2022-12-05 21:47:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:47:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:47:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:47:58,049 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 21:47:58,056 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 21:47:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:47:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 21:47:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:47:58,376 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 21:47:58,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:47:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:47:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205237289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:47:58,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:47:58,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 18 [2022-12-05 21:47:58,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626556666] [2022-12-05 21:47:58,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:47:58,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:47:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:47:58,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:47:58,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:47:58,612 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:47:58,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 890 transitions, 17474 flow. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 21:47:58,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:47:58,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:47:58,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:48:20,608 INFO L130 PetriNetUnfolder]: 60001/95214 cut-off events. [2022-12-05 21:48:20,609 INFO L131 PetriNetUnfolder]: For 1119674/1119674 co-relation queries the response was YES. [2022-12-05 21:48:21,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552554 conditions, 95214 events. 60001/95214 cut-off events. For 1119674/1119674 co-relation queries the response was YES. Maximal size of possible extension queue 4109. Compared 829307 event pairs, 2318 based on Foata normal form. 4686/99899 useless extension candidates. Maximal degree in co-relation 552468. Up to 19149 conditions per place. [2022-12-05 21:48:22,324 INFO L137 encePairwiseOnDemand]: 21/35 looper letters, 1037 selfloop transitions, 778 changer transitions 99/1914 dead transitions. [2022-12-05 21:48:22,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1914 transitions, 33075 flow [2022-12-05 21:48:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 21:48:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 21:48:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 560 transitions. [2022-12-05 21:48:22,327 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2022-12-05 21:48:22,327 INFO L175 Difference]: Start difference. First operand has 182 places, 890 transitions, 17474 flow. Second operand 37 states and 560 transitions. [2022-12-05 21:48:22,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1914 transitions, 33075 flow [2022-12-05 21:48:44,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1914 transitions, 30278 flow, removed 1117 selfloop flow, removed 5 redundant places. [2022-12-05 21:48:44,300 INFO L231 Difference]: Finished difference. Result has 245 places, 1338 transitions, 25085 flow [2022-12-05 21:48:44,300 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=15409, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25085, PETRI_PLACES=245, PETRI_TRANSITIONS=1338} [2022-12-05 21:48:44,301 INFO L294 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2022-12-05 21:48:44,301 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 1338 transitions, 25085 flow [2022-12-05 21:48:44,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 21:48:44,301 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:48:44,301 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:48:44,311 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 21:48:44,502 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,SelfDestructingSolverStorable15 [2022-12-05 21:48:44,502 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 21:48:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:48:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1969246504, now seen corresponding path program 2 times [2022-12-05 21:48:44,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:48:44,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646740645] [2022-12-05 21:48:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:48:44,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:48:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:48:44,793 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 21:48:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:48:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646740645] [2022-12-05 21:48:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646740645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:48:44,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:48:44,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 21:48:44,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734528462] [2022-12-05 21:48:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:48:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:48:44,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:48:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:48:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:48:44,796 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 35 [2022-12-05 21:48:44,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 1338 transitions, 25085 flow. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 21:48:44,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:48:44,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 35 [2022-12-05 21:48:44,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand