./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:27:07,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:27:07,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:27:07,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:27:07,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:27:07,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:27:07,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:27:07,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:27:07,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:27:07,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:27:07,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:27:07,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:27:07,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:27:07,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:27:07,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:27:07,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:27:07,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:27:07,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:27:07,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:27:07,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:27:07,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:27:07,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:27:07,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:27:07,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:27:07,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:27:07,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:27:07,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:27:07,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:27:07,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:27:07,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:27:07,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:27:07,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:27:07,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:27:07,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:27:07,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:27:07,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:27:07,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:27:07,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:27:07,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:27:07,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:27:07,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:27:07,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:27:07,752 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:27:07,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:27:07,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:27:07,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:27:07,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:27:07,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:27:07,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:27:07,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:27:07,755 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:27:07,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:27:07,756 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:27:07,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:27:07,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:27:07,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:27:07,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:27:07,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:27:07,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:27:07,757 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:27:07,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:27:07,758 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:27:07,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:27:07,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:27:07,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:27:07,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:27:07,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:27:07,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:27:07,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:27:07,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:27:07,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:27:07,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:27:07,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:27:07,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:27:07,760 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:27:07,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:27:07,761 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:27:07,761 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:27:08,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:27:08,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:27:08,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:27:08,049 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:27:08,049 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:27:08,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-09-01 13:27:09,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:27:09,441 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:27:09,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-09-01 13:27:09,447 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5ce5fd4/53bd270fff3842f599e508ba68b2a1cd/FLAG7fccab11f [2023-09-01 13:27:09,462 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5ce5fd4/53bd270fff3842f599e508ba68b2a1cd [2023-09-01 13:27:09,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:27:09,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:27:09,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:27:09,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:27:09,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:27:09,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e3926b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09, skipping insertion in model container [2023-09-01 13:27:09,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:27:09,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:27:09,645 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2023-09-01 13:27:09,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:27:09,660 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:27:09,684 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2023-09-01 13:27:09,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:27:09,695 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:27:09,696 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:27:09,701 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:27:09,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09 WrapperNode [2023-09-01 13:27:09,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:27:09,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:27:09,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:27:09,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:27:09,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,741 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-09-01 13:27:09,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:27:09,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:27:09,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:27:09,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:27:09,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:27:09,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:27:09,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:27:09,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:27:09,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (1/1) ... [2023-09-01 13:27:09,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:27:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:09,818 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) [2023-09-01 13:27:09,832 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 [2023-09-01 13:27:09,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:27:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:27:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:27:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:27:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:27:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:27:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:27:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:27:09,866 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:27:09,961 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:27:09,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:27:10,172 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:27:10,210 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:27:10,211 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 13:27:10,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:27:10 BoogieIcfgContainer [2023-09-01 13:27:10,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:27:10,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:27:10,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:27:10,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:27:10,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:27:09" (1/3) ... [2023-09-01 13:27:10,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8ddcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:27:10, skipping insertion in model container [2023-09-01 13:27:10,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:09" (2/3) ... [2023-09-01 13:27:10,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8ddcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:27:10, skipping insertion in model container [2023-09-01 13:27:10,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:27:10" (3/3) ... [2023-09-01 13:27:10,220 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-09-01 13:27:10,226 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:27:10,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:27:10,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:27:10,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:27:10,294 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:27:10,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-09-01 13:27:10,417 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2023-09-01 13:27:10,417 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:27:10,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-09-01 13:27:10,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-09-01 13:27:10,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-09-01 13:27:10,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:27:10,443 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-09-01 13:27:10,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-09-01 13:27:10,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-09-01 13:27:10,492 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2023-09-01 13:27:10,492 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:27:10,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-09-01 13:27:10,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-09-01 13:27:12,411 INFO L134 LiptonReduction]: Checked pairs total: 583 [2023-09-01 13:27:12,412 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-09-01 13:27:12,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:27:12,429 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=true, 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;@585a6404, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:27:12,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:27:12,433 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 13:27:12,433 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:27:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:12,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:12,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:12,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1436261647, now seen corresponding path program 1 times [2023-09-01 13:27:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:12,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396721991] [2023-09-01 13:27:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396721991] [2023-09-01 13:27:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396721991] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:12,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:12,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:27:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102163035] [2023-09-01 13:27:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:27:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:27:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:27:12,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 151 [2023-09-01 13:27:12,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:12,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:12,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 151 [2023-09-01 13:27:12,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:13,024 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-09-01 13:27:13,025 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 13:27:13,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-09-01 13:27:13,027 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-09-01 13:27:13,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-09-01 13:27:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:27:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:27:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-09-01 13:27:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165562913907285 [2023-09-01 13:27:13,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-09-01 13:27:13,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-09-01 13:27:13,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:13,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-09-01 13:27:13,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,052 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 234 transitions. [2023-09-01 13:27:13,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-09-01 13:27:13,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:27:13,056 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-09-01 13:27:13,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-09-01 13:27:13,061 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 13:27:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-09-01 13:27:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:27:13,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:13,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1046577200, now seen corresponding path program 1 times [2023-09-01 13:27:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:13,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698769746] [2023-09-01 13:27:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:13,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698769746] [2023-09-01 13:27:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698769746] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:13,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:27:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462699320] [2023-09-01 13:27:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:13,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:27:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:27:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:27:13,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 151 [2023-09-01 13:27:13,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:13,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 151 [2023-09-01 13:27:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:13,336 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2023-09-01 13:27:13,337 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 13:27:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-09-01 13:27:13,339 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-09-01 13:27:13,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2023-09-01 13:27:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:27:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:27:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 352 transitions. [2023-09-01 13:27:13,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46622516556291393 [2023-09-01 13:27:13,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 352 transitions. [2023-09-01 13:27:13,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 352 transitions. [2023-09-01 13:27:13,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:13,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 352 transitions. [2023-09-01 13:27:13,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,352 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,352 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 352 transitions. [2023-09-01 13:27:13,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2023-09-01 13:27:13,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:27:13,354 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2023-09-01 13:27:13,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-09-01 13:27:13,355 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 13:27:13,355 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2023-09-01 13:27:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:13,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:27:13,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:13,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1397973902, now seen corresponding path program 2 times [2023-09-01 13:27:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624649366] [2023-09-01 13:27:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624649366] [2023-09-01 13:27:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624649366] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620887215] [2023-09-01 13:27:13,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:13,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:13,473 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) [2023-09-01 13:27:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:27:13,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:27:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:13,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620887215] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:13,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:27:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-09-01 13:27:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666030130] [2023-09-01 13:27:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:27:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:27:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 13:27:13,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-09-01 13:27:13,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:13,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-09-01 13:27:13,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:13,788 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2023-09-01 13:27:13,788 INFO L131 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2023-09-01 13:27:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2023-09-01 13:27:13,790 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-09-01 13:27:13,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2023-09-01 13:27:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:27:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:27:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-09-01 13:27:13,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817880794701987 [2023-09-01 13:27:13,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-09-01 13:27:13,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-09-01 13:27:13,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:13,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-09-01 13:27:13,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,795 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 291 transitions. [2023-09-01 13:27:13,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2023-09-01 13:27:13,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 13:27:13,797 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-09-01 13:27:13,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-09-01 13:27:13,798 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-09-01 13:27:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-09-01 13:27:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:13,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:14,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:14,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:14,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1096485560, now seen corresponding path program 3 times [2023-09-01 13:27:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:14,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276283795] [2023-09-01 13:27:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:14,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276283795] [2023-09-01 13:27:14,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276283795] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:14,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963010864] [2023-09-01 13:27:14,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:14,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:14,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:14,131 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) [2023-09-01 13:27:14,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:27:14,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:27:14,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:27:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963010864] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:14,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:14,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-09-01 13:27:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642252515] [2023-09-01 13:27:14,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:27:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:27:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:27:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:14,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:14,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:14,485 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2023-09-01 13:27:14,485 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-09-01 13:27:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2023-09-01 13:27:14,490 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2023-09-01 13:27:14,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2023-09-01 13:27:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:27:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:27:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 487 transitions. [2023-09-01 13:27:14,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607379375591296 [2023-09-01 13:27:14,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 487 transitions. [2023-09-01 13:27:14,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 487 transitions. [2023-09-01 13:27:14,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:14,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 487 transitions. [2023-09-01 13:27:14,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,497 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 487 transitions. [2023-09-01 13:27:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2023-09-01 13:27:14,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:27:14,503 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2023-09-01 13:27:14,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-09-01 13:27:14,504 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-09-01 13:27:14,505 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2023-09-01 13:27:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:14,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:14,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:14,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 13:27:14,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 13:27:14,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:14,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash -39967956, now seen corresponding path program 4 times [2023-09-01 13:27:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:14,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963291560] [2023-09-01 13:27:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:14,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:14,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963291560] [2023-09-01 13:27:14,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963291560] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:14,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316155173] [2023-09-01 13:27:14,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:14,796 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) [2023-09-01 13:27:14,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:27:14,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:14,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:27:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:14,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316155173] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:14,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:14,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 13:27:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214734820] [2023-09-01 13:27:14,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:27:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:27:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:27:15,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:15,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:15,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:15,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:15,101 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2023-09-01 13:27:15,101 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-09-01 13:27:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2023-09-01 13:27:15,103 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2023-09-01 13:27:15,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2023-09-01 13:27:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:27:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:27:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2023-09-01 13:27:15,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-09-01 13:27:15,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2023-09-01 13:27:15,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2023-09-01 13:27:15,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:15,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2023-09-01 13:27:15,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,109 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,109 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 348 transitions. [2023-09-01 13:27:15,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2023-09-01 13:27:15,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 13:27:15,113 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2023-09-01 13:27:15,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-09-01 13:27:15,116 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-09-01 13:27:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2023-09-01 13:27:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:15,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:15,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:15,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -323427280, now seen corresponding path program 1 times [2023-09-01 13:27:15,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:15,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357505872] [2023-09-01 13:27:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:15,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357505872] [2023-09-01 13:27:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357505872] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250365919] [2023-09-01 13:27:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:15,451 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) [2023-09-01 13:27:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:27:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 13:27:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:15,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:15,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250365919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:15,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:15,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-09-01 13:27:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030736464] [2023-09-01 13:27:15,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 13:27:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 13:27:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 13:27:15,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 151 [2023-09-01 13:27:15,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:15,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 151 [2023-09-01 13:27:15,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:15,690 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2023-09-01 13:27:15,690 INFO L131 PetriNetUnfolder]: For 493/512 co-relation queries the response was YES. [2023-09-01 13:27:15,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 493/512 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 861 event pairs, 20 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2023-09-01 13:27:15,692 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-09-01 13:27:15,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2023-09-01 13:27:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:27:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:27:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-09-01 13:27:15,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082781456953642 [2023-09-01 13:27:15,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-09-01 13:27:15,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-09-01 13:27:15,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:15,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-09-01 13:27:15,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,697 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 307 transitions. [2023-09-01 13:27:15,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2023-09-01 13:27:15,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 13:27:15,700 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2023-09-01 13:27:15,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-09-01 13:27:15,701 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-09-01 13:27:15,701 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2023-09-01 13:27:15,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:15,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:15,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:15,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 13:27:15,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:15,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:15,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1179339409, now seen corresponding path program 2 times [2023-09-01 13:27:15,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:15,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873114607] [2023-09-01 13:27:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873114607] [2023-09-01 13:27:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873114607] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390329283] [2023-09-01 13:27:16,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:16,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:16,033 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) [2023-09-01 13:27:16,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:27:16,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:16,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:16,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:16,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390329283] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:16,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-09-01 13:27:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181774357] [2023-09-01 13:27:16,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:27:16,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:27:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:27:16,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:16,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:16,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:16,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:16,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:16,631 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-09-01 13:27:16,632 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2023-09-01 13:27:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 503 events. 265/503 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 41 based on Foata normal form. 12/515 useless extension candidates. Maximal degree in co-relation 1607. Up to 185 conditions per place. [2023-09-01 13:27:16,635 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 68 selfloop transitions, 20 changer transitions 7/95 dead transitions. [2023-09-01 13:27:16,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 738 flow [2023-09-01 13:27:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:27:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:27:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 696 transitions. [2023-09-01 13:27:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-09-01 13:27:16,638 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 696 transitions. [2023-09-01 13:27:16,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 696 transitions. [2023-09-01 13:27:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 696 transitions. [2023-09-01 13:27:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.6) internal successors, (696), 10 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:16,643 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 10 states and 696 transitions. [2023-09-01 13:27:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 738 flow [2023-09-01 13:27:16,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 720 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-09-01 13:27:16,648 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 448 flow [2023-09-01 13:27:16,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-09-01 13:27:16,649 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-09-01 13:27:16,649 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 448 flow [2023-09-01 13:27:16,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:16,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:16,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:16,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:16,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:16,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:16,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1524658179, now seen corresponding path program 3 times [2023-09-01 13:27:16,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795566948] [2023-09-01 13:27:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795566948] [2023-09-01 13:27:16,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795566948] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537581213] [2023-09-01 13:27:16,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:16,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:16,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:16,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:27:17,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:27:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537581213] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:17,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 13:27:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744859731] [2023-09-01 13:27:17,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:17,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:27:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:27:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:27:17,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:17,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 448 flow. Second operand has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:17,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:17,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:17,847 INFO L130 PetriNetUnfolder]: 335/629 cut-off events. [2023-09-01 13:27:17,848 INFO L131 PetriNetUnfolder]: For 2648/2648 co-relation queries the response was YES. [2023-09-01 13:27:17,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 629 events. 335/629 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2877 event pairs, 45 based on Foata normal form. 38/667 useless extension candidates. Maximal degree in co-relation 2424. Up to 209 conditions per place. [2023-09-01 13:27:17,853 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 90 selfloop transitions, 40 changer transitions 10/140 dead transitions. [2023-09-01 13:27:17,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 140 transitions, 1179 flow [2023-09-01 13:27:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:27:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:27:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1241 transitions. [2023-09-01 13:27:17,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565857247976453 [2023-09-01 13:27:17,857 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1241 transitions. [2023-09-01 13:27:17,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1241 transitions. [2023-09-01 13:27:17,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:17,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1241 transitions. [2023-09-01 13:27:17,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.94444444444444) internal successors, (1241), 18 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:17,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:17,866 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:17,866 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 448 flow. Second operand 18 states and 1241 transitions. [2023-09-01 13:27:17,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 140 transitions, 1179 flow [2023-09-01 13:27:17,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 140 transitions, 1104 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-09-01 13:27:17,875 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 725 flow [2023-09-01 13:27:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=725, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-09-01 13:27:17,876 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-09-01 13:27:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 725 flow [2023-09-01 13:27:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:17,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:17,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:18,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:18,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:18,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1900702783, now seen corresponding path program 4 times [2023-09-01 13:27:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753199532] [2023-09-01 13:27:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753199532] [2023-09-01 13:27:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753199532] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269141490] [2023-09-01 13:27:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:18,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:18,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:27:18,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:18,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269141490] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:18,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:18,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 13:27:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018229768] [2023-09-01 13:27:18,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:27:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:27:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:27:18,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:18,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:18,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:18,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:18,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:19,426 INFO L130 PetriNetUnfolder]: 469/939 cut-off events. [2023-09-01 13:27:19,426 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-09-01 13:27:19,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 939 events. 469/939 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5117 event pairs, 10 based on Foata normal form. 16/955 useless extension candidates. Maximal degree in co-relation 4818. Up to 293 conditions per place. [2023-09-01 13:27:19,431 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 121 selfloop transitions, 91 changer transitions 44/256 dead transitions. [2023-09-01 13:27:19,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 256 transitions, 2777 flow [2023-09-01 13:27:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 13:27:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 13:27:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2174 transitions. [2023-09-01 13:27:19,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991721854304634 [2023-09-01 13:27:19,438 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2174 transitions. [2023-09-01 13:27:19,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2174 transitions. [2023-09-01 13:27:19,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:19,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2174 transitions. [2023-09-01 13:27:19,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 67.9375) internal successors, (2174), 32 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:19,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:19,454 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:19,454 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 725 flow. Second operand 32 states and 2174 transitions. [2023-09-01 13:27:19,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 256 transitions, 2777 flow [2023-09-01 13:27:19,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 256 transitions, 2456 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-09-01 13:27:19,483 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1544 flow [2023-09-01 13:27:19,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1544, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2023-09-01 13:27:19,485 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-09-01 13:27:19,485 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1544 flow [2023-09-01 13:27:19,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:19,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:19,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:19,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:19,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:19,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1874186445, now seen corresponding path program 5 times [2023-09-01 13:27:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487997575] [2023-09-01 13:27:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:19,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487997575] [2023-09-01 13:27:19,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487997575] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461346226] [2023-09-01 13:27:19,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:27:19,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:19,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:19,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:19,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:27:19,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:19,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461346226] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:20,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 13:27:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051942213] [2023-09-01 13:27:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:27:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:27:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:27:20,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:20,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1544 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:20,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:20,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:20,650 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2023-09-01 13:27:20,651 INFO L131 PetriNetUnfolder]: For 13818/13818 co-relation queries the response was YES. [2023-09-01 13:27:20,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 798 events. 405/798 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4112 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4674. Up to 221 conditions per place. [2023-09-01 13:27:20,658 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 103 selfloop transitions, 86 changer transitions 3/192 dead transitions. [2023-09-01 13:27:20,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 2332 flow [2023-09-01 13:27:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:27:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:27:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1358 transitions. [2023-09-01 13:27:20,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44966887417218543 [2023-09-01 13:27:20,663 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1358 transitions. [2023-09-01 13:27:20,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1358 transitions. [2023-09-01 13:27:20,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:20,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1358 transitions. [2023-09-01 13:27:20,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.9) internal successors, (1358), 20 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,672 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,672 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1544 flow. Second operand 20 states and 1358 transitions. [2023-09-01 13:27:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 2332 flow [2023-09-01 13:27:20,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1998 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-09-01 13:27:20,706 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1491 flow [2023-09-01 13:27:20,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1491, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2023-09-01 13:27:20,707 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-09-01 13:27:20,707 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1491 flow [2023-09-01 13:27:20,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:20,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:20,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 13:27:20,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:20,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1455539503, now seen corresponding path program 6 times [2023-09-01 13:27:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910512017] [2023-09-01 13:27:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910512017] [2023-09-01 13:27:21,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910512017] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732277093] [2023-09-01 13:27:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:27:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:21,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:21,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:27:21,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:27:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:21,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732277093] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:21,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 13:27:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680296278] [2023-09-01 13:27:21,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:27:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:27:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:27:21,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:21,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1491 flow. Second operand has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:21,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:21,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:22,184 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2023-09-01 13:27:22,184 INFO L131 PetriNetUnfolder]: For 32066/32066 co-relation queries the response was YES. [2023-09-01 13:27:22,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 1264 events. 649/1264 cut-off events. For 32066/32066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7386 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 8056. Up to 686 conditions per place. [2023-09-01 13:27:22,199 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 124 changer transitions 2/305 dead transitions. [2023-09-01 13:27:22,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 3898 flow [2023-09-01 13:27:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 13:27:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 13:27:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1643 transitions. [2023-09-01 13:27:22,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533664459161148 [2023-09-01 13:27:22,204 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1643 transitions. [2023-09-01 13:27:22,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1643 transitions. [2023-09-01 13:27:22,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:22,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1643 transitions. [2023-09-01 13:27:22,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 68.45833333333333) internal successors, (1643), 24 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,214 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,214 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1491 flow. Second operand 24 states and 1643 transitions. [2023-09-01 13:27:22,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 3898 flow [2023-09-01 13:27:22,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 305 transitions, 3711 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-09-01 13:27:22,275 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 2926 flow [2023-09-01 13:27:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2926, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2023-09-01 13:27:22,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-09-01 13:27:22,276 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 2926 flow [2023-09-01 13:27:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:22,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:22,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:22,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:22,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash 862096835, now seen corresponding path program 7 times [2023-09-01 13:27:22,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:22,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258652823] [2023-09-01 13:27:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:22,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:22,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258652823] [2023-09-01 13:27:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258652823] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720488305] [2023-09-01 13:27:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:27:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:22,603 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:22,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:27:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:22,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:22,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720488305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:22,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:22,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 13:27:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204349122] [2023-09-01 13:27:22,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:27:22,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:27:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:27:22,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:22,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 2926 flow. Second operand has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:22,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:22,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:23,622 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2023-09-01 13:27:23,622 INFO L131 PetriNetUnfolder]: For 52704/52704 co-relation queries the response was YES. [2023-09-01 13:27:23,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1518 events. 759/1518 cut-off events. For 52704/52704 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9435 event pairs, 61 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11351. Up to 501 conditions per place. [2023-09-01 13:27:23,643 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 142 selfloop transitions, 163 changer transitions 6/311 dead transitions. [2023-09-01 13:27:23,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 5135 flow [2023-09-01 13:27:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:27:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:27:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2023-09-01 13:27:23,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461167971101746 [2023-09-01 13:27:23,646 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2023-09-01 13:27:23,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2023-09-01 13:27:23,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:23,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2023-09-01 13:27:23,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:23,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:23,654 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:23,654 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 2926 flow. Second operand 22 states and 1482 transitions. [2023-09-01 13:27:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 5135 flow [2023-09-01 13:27:23,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 4534 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-09-01 13:27:23,780 INFO L231 Difference]: Finished difference. Result has 163 places, 242 transitions, 3757 flow [2023-09-01 13:27:23,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3757, PETRI_PLACES=163, PETRI_TRANSITIONS=242} [2023-09-01 13:27:23,781 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-09-01 13:27:23,781 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 242 transitions, 3757 flow [2023-09-01 13:27:23,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:23,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:23,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:23,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:23,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:27:23,987 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:23,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash 860907543, now seen corresponding path program 8 times [2023-09-01 13:27:23,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:23,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318942232] [2023-09-01 13:27:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:23,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318942232] [2023-09-01 13:27:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318942232] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619549110] [2023-09-01 13:27:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:24,092 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:24,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:27:24,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:27:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:24,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619549110] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:24,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:24,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 13:27:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652566564] [2023-09-01 13:27:24,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:27:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:27:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:27:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:24,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 242 transitions, 3757 flow. Second operand has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:24,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:24,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:24,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:24,943 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2023-09-01 13:27:24,944 INFO L131 PetriNetUnfolder]: For 68928/68928 co-relation queries the response was YES. [2023-09-01 13:27:24,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12559 conditions, 1444 events. 729/1444 cut-off events. For 68928/68928 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8778 event pairs, 155 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11185. Up to 681 conditions per place. [2023-09-01 13:27:25,013 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 127 selfloop transitions, 143 changer transitions 3/273 dead transitions. [2023-09-01 13:27:25,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 4407 flow [2023-09-01 13:27:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:27:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:27:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 883 transitions. [2023-09-01 13:27:25,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44982170147733064 [2023-09-01 13:27:25,016 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 883 transitions. [2023-09-01 13:27:25,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 883 transitions. [2023-09-01 13:27:25,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 883 transitions. [2023-09-01 13:27:25,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.92307692307692) internal successors, (883), 13 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,021 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,021 INFO L175 Difference]: Start difference. First operand has 163 places, 242 transitions, 3757 flow. Second operand 13 states and 883 transitions. [2023-09-01 13:27:25,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 4407 flow [2023-09-01 13:27:25,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4211 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-09-01 13:27:25,182 INFO L231 Difference]: Finished difference. Result has 173 places, 237 transitions, 3869 flow [2023-09-01 13:27:25,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3869, PETRI_PLACES=173, PETRI_TRANSITIONS=237} [2023-09-01 13:27:25,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-09-01 13:27:25,184 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 237 transitions, 3869 flow [2023-09-01 13:27:25,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:25,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:25,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:27:25,391 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:25,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1477455475, now seen corresponding path program 9 times [2023-09-01 13:27:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:25,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422946218] [2023-09-01 13:27:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422946218] [2023-09-01 13:27:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422946218] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065498847] [2023-09-01 13:27:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:25,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:25,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:25,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:27:25,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:27:25,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 13:27:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:25,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:26,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065498847] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:26,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:26,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 13:27:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596861471] [2023-09-01 13:27:26,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:26,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:27:26,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:27:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:27:26,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2023-09-01 13:27:26,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 237 transitions, 3869 flow. Second operand has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:26,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:26,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2023-09-01 13:27:26,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:27,039 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2023-09-01 13:27:27,040 INFO L131 PetriNetUnfolder]: For 96941/96952 co-relation queries the response was YES. [2023-09-01 13:27:27,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 1788 events. 879/1788 cut-off events. For 96941/96952 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11793 event pairs, 120 based on Foata normal form. 82/1870 useless extension candidates. Maximal degree in co-relation 15717. Up to 900 conditions per place. [2023-09-01 13:27:27,064 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 196 selfloop transitions, 89 changer transitions 61/352 dead transitions. [2023-09-01 13:27:27,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 352 transitions, 6317 flow [2023-09-01 13:27:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:27:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:27:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 655 transitions. [2023-09-01 13:27:27,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337748344370861 [2023-09-01 13:27:27,067 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 655 transitions. [2023-09-01 13:27:27,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 655 transitions. [2023-09-01 13:27:27,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:27,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 655 transitions. [2023-09-01 13:27:27,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:27,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:27,070 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:27,070 INFO L175 Difference]: Start difference. First operand has 173 places, 237 transitions, 3869 flow. Second operand 10 states and 655 transitions. [2023-09-01 13:27:27,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 352 transitions, 6317 flow [2023-09-01 13:27:27,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 6029 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-09-01 13:27:27,309 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 4397 flow [2023-09-01 13:27:27,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4397, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2023-09-01 13:27:27,310 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2023-09-01 13:27:27,311 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 4397 flow [2023-09-01 13:27:27,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:27,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:27,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:27,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:27:27,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:27,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2063184372, now seen corresponding path program 10 times [2023-09-01 13:27:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310264057] [2023-09-01 13:27:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:27,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310264057] [2023-09-01 13:27:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310264057] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107575359] [2023-09-01 13:27:27,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:27,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:27,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:27,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:27,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:27:27,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:27,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:27,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107575359] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:27,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:27,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 13:27:27,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916856504] [2023-09-01 13:27:27,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:27,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:27:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:27:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:27:27,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:27,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 4397 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:27,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:27,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:27,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:29,208 INFO L130 PetriNetUnfolder]: 1647/3340 cut-off events. [2023-09-01 13:27:29,209 INFO L131 PetriNetUnfolder]: For 174080/174080 co-relation queries the response was YES. [2023-09-01 13:27:29,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31526 conditions, 3340 events. 1647/3340 cut-off events. For 174080/174080 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24487 event pairs, 203 based on Foata normal form. 68/3408 useless extension candidates. Maximal degree in co-relation 27779. Up to 1261 conditions per place. [2023-09-01 13:27:29,250 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 450 selfloop transitions, 146 changer transitions 2/598 dead transitions. [2023-09-01 13:27:29,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 598 transitions, 11388 flow [2023-09-01 13:27:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:27:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:27:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1172 transitions. [2023-09-01 13:27:29,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-09-01 13:27:29,253 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1172 transitions. [2023-09-01 13:27:29,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1172 transitions. [2023-09-01 13:27:29,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:29,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1172 transitions. [2023-09-01 13:27:29,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 68.94117647058823) internal successors, (1172), 17 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,266 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,266 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 4397 flow. Second operand 17 states and 1172 transitions. [2023-09-01 13:27:29,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 598 transitions, 11388 flow [2023-09-01 13:27:29,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 598 transitions, 11113 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-09-01 13:27:29,528 INFO L231 Difference]: Finished difference. Result has 179 places, 361 transitions, 7164 flow [2023-09-01 13:27:29,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7164, PETRI_PLACES=179, PETRI_TRANSITIONS=361} [2023-09-01 13:27:29,528 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-09-01 13:27:29,529 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 361 transitions, 7164 flow [2023-09-01 13:27:29,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:29,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:29,529 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:29,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 13:27:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:27:29,730 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:29,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -475875398, now seen corresponding path program 11 times [2023-09-01 13:27:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:29,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793314213] [2023-09-01 13:27:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:29,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793314213] [2023-09-01 13:27:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793314213] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072907385] [2023-09-01 13:27:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:27:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:29,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:29,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:29,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:27:29,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:27:29,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:30,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:30,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072907385] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:30,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:30,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 13:27:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605936287] [2023-09-01 13:27:30,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:27:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:27:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:27:30,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:30,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 361 transitions, 7164 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:30,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:30,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:30,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:32,073 INFO L130 PetriNetUnfolder]: 1772/3571 cut-off events. [2023-09-01 13:27:32,073 INFO L131 PetriNetUnfolder]: For 183020/183020 co-relation queries the response was YES. [2023-09-01 13:27:32,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 3571 events. 1772/3571 cut-off events. For 183020/183020 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26445 event pairs, 231 based on Foata normal form. 58/3629 useless extension candidates. Maximal degree in co-relation 31693. Up to 1314 conditions per place. [2023-09-01 13:27:32,108 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 513 selfloop transitions, 195 changer transitions 2/710 dead transitions. [2023-09-01 13:27:32,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 710 transitions, 13680 flow [2023-09-01 13:27:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 13:27:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 13:27:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2386 transitions. [2023-09-01 13:27:32,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146641438032165 [2023-09-01 13:27:32,113 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2386 transitions. [2023-09-01 13:27:32,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2386 transitions. [2023-09-01 13:27:32,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:32,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2386 transitions. [2023-09-01 13:27:32,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.17142857142858) internal successors, (2386), 35 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:32,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:32,122 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:32,122 INFO L175 Difference]: Start difference. First operand has 179 places, 361 transitions, 7164 flow. Second operand 35 states and 2386 transitions. [2023-09-01 13:27:32,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 710 transitions, 13680 flow [2023-09-01 13:27:32,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 710 transitions, 12959 flow, removed 328 selfloop flow, removed 5 redundant places. [2023-09-01 13:27:32,533 INFO L231 Difference]: Finished difference. Result has 219 places, 426 transitions, 8638 flow [2023-09-01 13:27:32,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8638, PETRI_PLACES=219, PETRI_TRANSITIONS=426} [2023-09-01 13:27:32,534 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-09-01 13:27:32,534 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 426 transitions, 8638 flow [2023-09-01 13:27:32,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:32,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:32,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:32,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 13:27:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:32,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:32,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1140862416, now seen corresponding path program 12 times [2023-09-01 13:27:32,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:32,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807124042] [2023-09-01 13:27:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:32,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807124042] [2023-09-01 13:27:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807124042] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572148502] [2023-09-01 13:27:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:27:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:33,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:27:33,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:27:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:33,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572148502] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:33,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-09-01 13:27:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081432655] [2023-09-01 13:27:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:27:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:27:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:27:33,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:33,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 426 transitions, 8638 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:33,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:33,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:33,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:36,378 INFO L130 PetriNetUnfolder]: 2172/4396 cut-off events. [2023-09-01 13:27:36,379 INFO L131 PetriNetUnfolder]: For 281276/281276 co-relation queries the response was YES. [2023-09-01 13:27:36,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 4396 events. 2172/4396 cut-off events. For 281276/281276 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34209 event pairs, 80 based on Foata normal form. 38/4434 useless extension candidates. Maximal degree in co-relation 45755. Up to 1393 conditions per place. [2023-09-01 13:27:36,509 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 301 selfloop transitions, 579 changer transitions 32/912 dead transitions. [2023-09-01 13:27:36,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 912 transitions, 19241 flow [2023-09-01 13:27:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-09-01 13:27:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-09-01 13:27:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4048 transitions. [2023-09-01 13:27:36,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467991169977925 [2023-09-01 13:27:36,523 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4048 transitions. [2023-09-01 13:27:36,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4048 transitions. [2023-09-01 13:27:36,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:36,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4048 transitions. [2023-09-01 13:27:36,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 67.46666666666667) internal successors, (4048), 60 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:36,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:36,549 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:36,549 INFO L175 Difference]: Start difference. First operand has 219 places, 426 transitions, 8638 flow. Second operand 60 states and 4048 transitions. [2023-09-01 13:27:36,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 912 transitions, 19241 flow [2023-09-01 13:27:37,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 912 transitions, 18425 flow, removed 353 selfloop flow, removed 10 redundant places. [2023-09-01 13:27:37,324 INFO L231 Difference]: Finished difference. Result has 285 places, 676 transitions, 15440 flow [2023-09-01 13:27:37,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15440, PETRI_PLACES=285, PETRI_TRANSITIONS=676} [2023-09-01 13:27:37,325 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-09-01 13:27:37,325 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 676 transitions, 15440 flow [2023-09-01 13:27:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:37,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:37,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:37,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 13:27:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:27:37,531 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:37,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 270066790, now seen corresponding path program 13 times [2023-09-01 13:27:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:37,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529305507] [2023-09-01 13:27:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:37,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529305507] [2023-09-01 13:27:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529305507] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215871653] [2023-09-01 13:27:37,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:27:37,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:37,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:37,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:27:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215871653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:37,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 13:27:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607094493] [2023-09-01 13:27:37,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:27:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:27:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:27:38,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:38,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 676 transitions, 15440 flow. Second operand has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:38,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:38,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:38,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:40,678 INFO L130 PetriNetUnfolder]: 2312/4614 cut-off events. [2023-09-01 13:27:40,679 INFO L131 PetriNetUnfolder]: For 486549/486549 co-relation queries the response was YES. [2023-09-01 13:27:40,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 4614 events. 2312/4614 cut-off events. For 486549/486549 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35739 event pairs, 229 based on Foata normal form. 90/4704 useless extension candidates. Maximal degree in co-relation 53799. Up to 1654 conditions per place. [2023-09-01 13:27:40,847 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 569 selfloop transitions, 324 changer transitions 20/913 dead transitions. [2023-09-01 13:27:40,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 913 transitions, 21042 flow [2023-09-01 13:27:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 13:27:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 13:27:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2383 transitions. [2023-09-01 13:27:40,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508987701040681 [2023-09-01 13:27:40,851 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2383 transitions. [2023-09-01 13:27:40,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2383 transitions. [2023-09-01 13:27:40,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:40,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2383 transitions. [2023-09-01 13:27:40,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.08571428571429) internal successors, (2383), 35 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:40,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:40,861 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:40,861 INFO L175 Difference]: Start difference. First operand has 285 places, 676 transitions, 15440 flow. Second operand 35 states and 2383 transitions. [2023-09-01 13:27:40,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 913 transitions, 21042 flow [2023-09-01 13:27:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 18678 flow, removed 1059 selfloop flow, removed 17 redundant places. [2023-09-01 13:27:42,390 INFO L231 Difference]: Finished difference. Result has 307 places, 734 transitions, 15851 flow [2023-09-01 13:27:42,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13381, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15851, PETRI_PLACES=307, PETRI_TRANSITIONS=734} [2023-09-01 13:27:42,391 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-09-01 13:27:42,391 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 734 transitions, 15851 flow [2023-09-01 13:27:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:42,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:42,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:42,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 13:27:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:27:42,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:42,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1139673124, now seen corresponding path program 14 times [2023-09-01 13:27:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586571040] [2023-09-01 13:27:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:42,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:42,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586571040] [2023-09-01 13:27:42,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586571040] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:42,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055835849] [2023-09-01 13:27:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:42,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:42,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:27:42,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:27:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:43,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055835849] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:43,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-09-01 13:27:43,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376487343] [2023-09-01 13:27:43,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:27:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:27:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:27:43,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:43,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 734 transitions, 15851 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:43,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:43,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:43,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:45,937 INFO L130 PetriNetUnfolder]: 2324/4664 cut-off events. [2023-09-01 13:27:45,938 INFO L131 PetriNetUnfolder]: For 560320/560320 co-relation queries the response was YES. [2023-09-01 13:27:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54453 conditions, 4664 events. 2324/4664 cut-off events. For 560320/560320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36423 event pairs, 172 based on Foata normal form. 72/4736 useless extension candidates. Maximal degree in co-relation 53939. Up to 1105 conditions per place. [2023-09-01 13:27:45,990 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 374 selfloop transitions, 541 changer transitions 3/918 dead transitions. [2023-09-01 13:27:45,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 918 transitions, 20073 flow [2023-09-01 13:27:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 13:27:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 13:27:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2992 transitions. [2023-09-01 13:27:45,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-09-01 13:27:45,995 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2992 transitions. [2023-09-01 13:27:45,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2992 transitions. [2023-09-01 13:27:45,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:45,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2992 transitions. [2023-09-01 13:27:45,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 68.0) internal successors, (2992), 44 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:46,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:46,005 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:46,005 INFO L175 Difference]: Start difference. First operand has 307 places, 734 transitions, 15851 flow. Second operand 44 states and 2992 transitions. [2023-09-01 13:27:46,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 918 transitions, 20073 flow [2023-09-01 13:27:47,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 918 transitions, 19432 flow, removed 223 selfloop flow, removed 17 redundant places. [2023-09-01 13:27:47,823 INFO L231 Difference]: Finished difference. Result has 343 places, 742 transitions, 16941 flow [2023-09-01 13:27:47,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15020, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16941, PETRI_PLACES=343, PETRI_TRANSITIONS=742} [2023-09-01 13:27:47,824 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-09-01 13:27:47,824 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 742 transitions, 16941 flow [2023-09-01 13:27:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:47,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:47,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:47,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:48,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:48,025 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:48,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -452021610, now seen corresponding path program 15 times [2023-09-01 13:27:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:48,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597223385] [2023-09-01 13:27:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597223385] [2023-09-01 13:27:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597223385] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125738487] [2023-09-01 13:27:48,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:48,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:48,164 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:48,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:27:48,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:27:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:48,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:48,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125738487] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:48,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:48,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 13:27:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038524811] [2023-09-01 13:27:48,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:27:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:27:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:27:48,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:48,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 742 transitions, 16941 flow. Second operand has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:48,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:48,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:48,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:51,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 13:27:53,948 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2023-09-01 13:27:53,948 INFO L131 PetriNetUnfolder]: For 841141/841141 co-relation queries the response was YES. [2023-09-01 13:27:53,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 5587 events. 2789/5587 cut-off events. For 841141/841141 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45175 event pairs, 696 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 68655. Up to 3278 conditions per place. [2023-09-01 13:27:54,016 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 615 selfloop transitions, 410 changer transitions 24/1049 dead transitions. [2023-09-01 13:27:54,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1049 transitions, 25028 flow [2023-09-01 13:27:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 13:27:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 13:27:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2762 transitions. [2023-09-01 13:27:54,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461314811823615 [2023-09-01 13:27:54,022 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2762 transitions. [2023-09-01 13:27:54,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2762 transitions. [2023-09-01 13:27:54,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:54,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2762 transitions. [2023-09-01 13:27:54,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.36585365853658) internal successors, (2762), 41 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:54,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:54,033 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:54,033 INFO L175 Difference]: Start difference. First operand has 343 places, 742 transitions, 16941 flow. Second operand 41 states and 2762 transitions. [2023-09-01 13:27:54,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1049 transitions, 25028 flow [2023-09-01 13:27:56,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1049 transitions, 24238 flow, removed 117 selfloop flow, removed 32 redundant places. [2023-09-01 13:27:56,649 INFO L231 Difference]: Finished difference. Result has 364 places, 865 transitions, 21360 flow [2023-09-01 13:27:56,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=16275, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21360, PETRI_PLACES=364, PETRI_TRANSITIONS=865} [2023-09-01 13:27:56,650 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 344 predicate places. [2023-09-01 13:27:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 865 transitions, 21360 flow [2023-09-01 13:27:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:56,651 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:56,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:56,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:56,852 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:27:56,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1486062540, now seen corresponding path program 16 times [2023-09-01 13:27:56,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:56,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959167797] [2023-09-01 13:27:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:56,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959167797] [2023-09-01 13:27:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959167797] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367160805] [2023-09-01 13:27:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:56,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:56,985 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:27:57,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:27:57,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:57,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:27:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:57,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:57,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367160805] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:27:57,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:27:57,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 13:27:57,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747032905] [2023-09-01 13:27:57,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:27:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:27:57,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:27:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:27:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:27:57,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 865 transitions, 21360 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:57,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:57,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:27:57,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:00,740 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2023-09-01 13:28:00,741 INFO L131 PetriNetUnfolder]: For 1055485/1055485 co-relation queries the response was YES. [2023-09-01 13:28:00,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82781 conditions, 6320 events. 3178/6320 cut-off events. For 1055485/1055485 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51918 event pairs, 976 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81829. Up to 4281 conditions per place. [2023-09-01 13:28:00,827 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 854 selfloop transitions, 312 changer transitions 4/1170 dead transitions. [2023-09-01 13:28:00,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1170 transitions, 28762 flow [2023-09-01 13:28:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:28:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:28:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2652 transitions. [2023-09-01 13:28:00,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-09-01 13:28:00,832 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2652 transitions. [2023-09-01 13:28:00,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2652 transitions. [2023-09-01 13:28:00,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:00,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2652 transitions. [2023-09-01 13:28:00,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 68.0) internal successors, (2652), 39 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:00,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:00,843 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:00,843 INFO L175 Difference]: Start difference. First operand has 364 places, 865 transitions, 21360 flow. Second operand 39 states and 2652 transitions. [2023-09-01 13:28:00,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1170 transitions, 28762 flow [2023-09-01 13:28:04,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1170 transitions, 28239 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-09-01 13:28:04,274 INFO L231 Difference]: Finished difference. Result has 395 places, 969 transitions, 24660 flow [2023-09-01 13:28:04,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20847, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24660, PETRI_PLACES=395, PETRI_TRANSITIONS=969} [2023-09-01 13:28:04,275 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-09-01 13:28:04,275 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 969 transitions, 24660 flow [2023-09-01 13:28:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:04,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:04,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:04,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 13:28:04,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:04,481 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:04,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:04,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300304, now seen corresponding path program 17 times [2023-09-01 13:28:04,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:04,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352664774] [2023-09-01 13:28:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:04,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352664774] [2023-09-01 13:28:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352664774] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359117298] [2023-09-01 13:28:04,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:28:04,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:04,632 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:28:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:28:04,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:28:04,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:28:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:28:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:04,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359117298] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:04,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 13:28:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982483374] [2023-09-01 13:28:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:28:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:28:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:28:05,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:28:05,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 969 transitions, 24660 flow. Second operand has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:05,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:05,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:28:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:09,221 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2023-09-01 13:28:09,222 INFO L131 PetriNetUnfolder]: For 1265975/1265975 co-relation queries the response was YES. [2023-09-01 13:28:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93386 conditions, 6883 events. 3456/6883 cut-off events. For 1265975/1265975 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 57290 event pairs, 1244 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 92435. Up to 5461 conditions per place. [2023-09-01 13:28:09,328 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 915 selfloop transitions, 244 changer transitions 24/1183 dead transitions. [2023-09-01 13:28:09,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1183 transitions, 30799 flow [2023-09-01 13:28:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:28:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:28:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1840 transitions. [2023-09-01 13:28:09,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513122393917096 [2023-09-01 13:28:09,332 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1840 transitions. [2023-09-01 13:28:09,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1840 transitions. [2023-09-01 13:28:09,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:09,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1840 transitions. [2023-09-01 13:28:09,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 68.14814814814815) internal successors, (1840), 27 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:09,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:09,340 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:09,340 INFO L175 Difference]: Start difference. First operand has 395 places, 969 transitions, 24660 flow. Second operand 27 states and 1840 transitions. [2023-09-01 13:28:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1183 transitions, 30799 flow [2023-09-01 13:28:14,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1183 transitions, 30022 flow, removed 345 selfloop flow, removed 11 redundant places. [2023-09-01 13:28:14,235 INFO L231 Difference]: Finished difference. Result has 420 places, 1030 transitions, 26451 flow [2023-09-01 13:28:14,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26451, PETRI_PLACES=420, PETRI_TRANSITIONS=1030} [2023-09-01 13:28:14,237 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2023-09-01 13:28:14,237 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1030 transitions, 26451 flow [2023-09-01 13:28:14,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:14,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:14,238 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:28:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 13:28:14,443 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:14,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2075125822, now seen corresponding path program 18 times [2023-09-01 13:28:14,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:14,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802900933] [2023-09-01 13:28:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802900933] [2023-09-01 13:28:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802900933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493642790] [2023-09-01 13:28:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:28:14,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:14,588 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:28:14,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:28:14,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:28:14,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:28:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:28:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493642790] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:14,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 13:28:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905354285] [2023-09-01 13:28:14,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:28:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:28:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:28:14,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:28:14,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1030 transitions, 26451 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:14,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:14,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:28:14,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:19,175 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2023-09-01 13:28:19,175 INFO L131 PetriNetUnfolder]: For 1467705/1467705 co-relation queries the response was YES. [2023-09-01 13:28:19,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100365 conditions, 7375 events. 3726/7375 cut-off events. For 1467705/1467705 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61838 event pairs, 1357 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98807. Up to 6093 conditions per place. [2023-09-01 13:28:19,373 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1043 selfloop transitions, 263 changer transitions 3/1309 dead transitions. [2023-09-01 13:28:19,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1309 transitions, 34648 flow [2023-09-01 13:28:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:28:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:28:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2444 transitions. [2023-09-01 13:28:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495952906548933 [2023-09-01 13:28:19,376 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2444 transitions. [2023-09-01 13:28:19,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2444 transitions. [2023-09-01 13:28:19,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:19,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2444 transitions. [2023-09-01 13:28:19,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.88888888888889) internal successors, (2444), 36 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:19,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:19,384 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:19,384 INFO L175 Difference]: Start difference. First operand has 420 places, 1030 transitions, 26451 flow. Second operand 36 states and 2444 transitions. [2023-09-01 13:28:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1309 transitions, 34648 flow [2023-09-01 13:28:25,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1309 transitions, 33939 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-09-01 13:28:25,271 INFO L231 Difference]: Finished difference. Result has 457 places, 1131 transitions, 29835 flow [2023-09-01 13:28:25,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29835, PETRI_PLACES=457, PETRI_TRANSITIONS=1131} [2023-09-01 13:28:25,272 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-09-01 13:28:25,272 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1131 transitions, 29835 flow [2023-09-01 13:28:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:25,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:25,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:25,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 13:28:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 13:28:25,473 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:25,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2047021096, now seen corresponding path program 19 times [2023-09-01 13:28:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:25,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163276548] [2023-09-01 13:28:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:25,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163276548] [2023-09-01 13:28:25,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163276548] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314087444] [2023-09-01 13:28:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:28:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:25,612 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:28:25,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:28:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:28:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:25,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314087444] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:25,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 13:28:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530282843] [2023-09-01 13:28:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:28:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:28:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:28:25,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:28:25,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1131 transitions, 29835 flow. Second operand has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:25,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:25,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:28:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:30,099 INFO L130 PetriNetUnfolder]: 3929/7754 cut-off events. [2023-09-01 13:28:30,099 INFO L131 PetriNetUnfolder]: For 1847116/1847116 co-relation queries the response was YES. [2023-09-01 13:28:30,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108331 conditions, 7754 events. 3929/7754 cut-off events. For 1847116/1847116 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 65401 event pairs, 1523 based on Foata normal form. 140/7894 useless extension candidates. Maximal degree in co-relation 107213. Up to 6927 conditions per place. [2023-09-01 13:28:30,220 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1158 selfloop transitions, 186 changer transitions 4/1348 dead transitions. [2023-09-01 13:28:30,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1348 transitions, 35943 flow [2023-09-01 13:28:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:28:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:28:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2440 transitions. [2023-09-01 13:28:30,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44885945548197204 [2023-09-01 13:28:30,224 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2440 transitions. [2023-09-01 13:28:30,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2440 transitions. [2023-09-01 13:28:30,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:30,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2440 transitions. [2023-09-01 13:28:30,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.77777777777777) internal successors, (2440), 36 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:30,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:30,232 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:30,232 INFO L175 Difference]: Start difference. First operand has 457 places, 1131 transitions, 29835 flow. Second operand 36 states and 2440 transitions. [2023-09-01 13:28:30,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1348 transitions, 35943 flow [2023-09-01 13:28:37,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1348 transitions, 34927 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-09-01 13:28:37,363 INFO L231 Difference]: Finished difference. Result has 493 places, 1210 transitions, 31314 flow [2023-09-01 13:28:37,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31314, PETRI_PLACES=493, PETRI_TRANSITIONS=1210} [2023-09-01 13:28:37,365 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-09-01 13:28:37,365 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1210 transitions, 31314 flow [2023-09-01 13:28:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:37,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:37,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:37,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:28:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:37,571 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:37,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -447011944, now seen corresponding path program 20 times [2023-09-01 13:28:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575579293] [2023-09-01 13:28:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:37,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:37,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575579293] [2023-09-01 13:28:37,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575579293] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:37,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171730272] [2023-09-01 13:28:37,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:28:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:37,803 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:28:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:28:37,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:28:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:28:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:28:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:38,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171730272] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:38,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:38,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-09-01 13:28:38,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588165938] [2023-09-01 13:28:38,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:38,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:28:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:28:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:28:38,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:28:38,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1210 transitions, 31314 flow. Second operand has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:38,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:38,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:28:38,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:44,823 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2023-09-01 13:28:44,823 INFO L131 PetriNetUnfolder]: For 2475670/2475670 co-relation queries the response was YES. [2023-09-01 13:28:44,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129968 conditions, 8746 events. 4369/8746 cut-off events. For 2475670/2475670 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76357 event pairs, 753 based on Foata normal form. 66/8812 useless extension candidates. Maximal degree in co-relation 128951. Up to 3024 conditions per place. [2023-09-01 13:28:44,956 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 654 selfloop transitions, 859 changer transitions 15/1528 dead transitions. [2023-09-01 13:28:44,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1528 transitions, 41320 flow [2023-09-01 13:28:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 13:28:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 13:28:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2344 transitions. [2023-09-01 13:28:44,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-09-01 13:28:44,959 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2344 transitions. [2023-09-01 13:28:44,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2344 transitions. [2023-09-01 13:28:44,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:28:44,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2344 transitions. [2023-09-01 13:28:44,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 68.94117647058823) internal successors, (2344), 34 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:44,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:44,965 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:44,965 INFO L175 Difference]: Start difference. First operand has 493 places, 1210 transitions, 31314 flow. Second operand 34 states and 2344 transitions. [2023-09-01 13:28:44,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1528 transitions, 41320 flow [2023-09-01 13:28:54,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1528 transitions, 39723 flow, removed 731 selfloop flow, removed 10 redundant places. [2023-09-01 13:28:54,565 INFO L231 Difference]: Finished difference. Result has 531 places, 1327 transitions, 36308 flow [2023-09-01 13:28:54,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30014, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36308, PETRI_PLACES=531, PETRI_TRANSITIONS=1327} [2023-09-01 13:28:54,567 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-09-01 13:28:54,567 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1327 transitions, 36308 flow [2023-09-01 13:28:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:54,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:28:54,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:28:54,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 13:28:54,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:54,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:28:54,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:28:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash -431522972, now seen corresponding path program 21 times [2023-09-01 13:28:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:28:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693096275] [2023-09-01 13:28:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:28:54,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:28:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:28:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:28:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693096275] [2023-09-01 13:28:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693096275] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:28:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211543616] [2023-09-01 13:28:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:28:54,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:28:54,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:28:54,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:28:54,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:28:55,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:28:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:28:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:28:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:28:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:55,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:28:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211543616] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:55,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-09-01 13:28:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688871776] [2023-09-01 13:28:55,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:28:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:28:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:28:55,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:28:55,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1327 transitions, 36308 flow. Second operand has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:55,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:55,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:28:55,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:29:02,354 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2023-09-01 13:29:02,354 INFO L131 PetriNetUnfolder]: For 2683576/2683576 co-relation queries the response was YES. [2023-09-01 13:29:02,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137974 conditions, 8662 events. 4343/8662 cut-off events. For 2683576/2683576 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 75308 event pairs, 309 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 136861. Up to 2242 conditions per place. [2023-09-01 13:29:02,496 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 462 selfloop transitions, 1043 changer transitions 20/1525 dead transitions. [2023-09-01 13:29:02,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1525 transitions, 43576 flow [2023-09-01 13:29:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 13:29:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 13:29:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3532 transitions. [2023-09-01 13:29:02,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441334499562664 [2023-09-01 13:29:02,499 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3532 transitions. [2023-09-01 13:29:02,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3532 transitions. [2023-09-01 13:29:02,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:29:02,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3532 transitions. [2023-09-01 13:29:02,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 66.64150943396227) internal successors, (3532), 53 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:02,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:02,510 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:02,510 INFO L175 Difference]: Start difference. First operand has 531 places, 1327 transitions, 36308 flow. Second operand 53 states and 3532 transitions. [2023-09-01 13:29:02,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1525 transitions, 43576 flow [2023-09-01 13:29:14,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1525 transitions, 42749 flow, removed 368 selfloop flow, removed 14 redundant places. [2023-09-01 13:29:14,394 INFO L231 Difference]: Finished difference. Result has 576 places, 1372 transitions, 39675 flow [2023-09-01 13:29:14,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=35525, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39675, PETRI_PLACES=576, PETRI_TRANSITIONS=1372} [2023-09-01 13:29:14,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-09-01 13:29:14,396 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1372 transitions, 39675 flow [2023-09-01 13:29:14,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:14,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:29:14,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:29:14,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 13:29:14,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 13:29:14,601 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:29:14,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:29:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1260313288, now seen corresponding path program 22 times [2023-09-01 13:29:14,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:29:14,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246658257] [2023-09-01 13:29:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:29:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:29:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:29:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:29:14,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246658257] [2023-09-01 13:29:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246658257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:29:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703712932] [2023-09-01 13:29:14,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:29:14,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:29:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:29:14,721 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:29:14,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 13:29:14,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:29:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:29:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:29:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:29:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:14,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:29:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703712932] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:29:14,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:29:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 13:29:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426429269] [2023-09-01 13:29:14,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:29:14,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:29:14,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:29:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:29:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:29:15,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:29:15,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1372 transitions, 39675 flow. Second operand has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:15,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:29:15,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:29:15,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:29:21,123 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2023-09-01 13:29:21,123 INFO L131 PetriNetUnfolder]: For 2969489/2969489 co-relation queries the response was YES. [2023-09-01 13:29:21,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145649 conditions, 9035 events. 4554/9035 cut-off events. For 2969489/2969489 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 78522 event pairs, 1398 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 144763. Up to 6692 conditions per place. [2023-09-01 13:29:21,284 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1085 selfloop transitions, 463 changer transitions 21/1569 dead transitions. [2023-09-01 13:29:21,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1569 transitions, 47022 flow [2023-09-01 13:29:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 13:29:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 13:29:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1969 transitions. [2023-09-01 13:29:21,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44964603790819824 [2023-09-01 13:29:21,287 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1969 transitions. [2023-09-01 13:29:21,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1969 transitions. [2023-09-01 13:29:21,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:29:21,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1969 transitions. [2023-09-01 13:29:21,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 67.89655172413794) internal successors, (1969), 29 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:21,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:21,291 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:21,291 INFO L175 Difference]: Start difference. First operand has 576 places, 1372 transitions, 39675 flow. Second operand 29 states and 1969 transitions. [2023-09-01 13:29:21,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1569 transitions, 47022 flow [2023-09-01 13:29:35,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1569 transitions, 44869 flow, removed 842 selfloop flow, removed 19 redundant places. [2023-09-01 13:29:35,210 INFO L231 Difference]: Finished difference. Result has 592 places, 1442 transitions, 41737 flow [2023-09-01 13:29:35,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=37992, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41737, PETRI_PLACES=592, PETRI_TRANSITIONS=1442} [2023-09-01 13:29:35,211 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2023-09-01 13:29:35,211 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1442 transitions, 41737 flow [2023-09-01 13:29:35,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:35,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:29:35,212 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:29:35,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 13:29:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 13:29:35,412 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:29:35,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:29:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236764, now seen corresponding path program 23 times [2023-09-01 13:29:35,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:29:35,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150319893] [2023-09-01 13:29:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:29:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:29:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:29:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:29:35,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:29:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150319893] [2023-09-01 13:29:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150319893] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:29:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532431938] [2023-09-01 13:29:35,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:29:35,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:29:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:29:35,611 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:29:35,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 13:29:35,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:29:35,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:29:35,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 13:29:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:29:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:29:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:29:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:29:35,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532431938] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:29:35,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:29:35,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 13:29:35,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113239112] [2023-09-01 13:29:35,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:29:35,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:29:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:29:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:29:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:29:35,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-09-01 13:29:35,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1442 transitions, 41737 flow. Second operand has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:35,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:29:35,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-09-01 13:29:35,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:29:42,627 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2023-09-01 13:29:42,627 INFO L131 PetriNetUnfolder]: For 3857478/3857478 co-relation queries the response was YES. [2023-09-01 13:29:42,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191662 conditions, 11328 events. 5686/11328 cut-off events. For 3857478/3857478 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 102236 event pairs, 603 based on Foata normal form. 194/11522 useless extension candidates. Maximal degree in co-relation 190401. Up to 5610 conditions per place. [2023-09-01 13:29:42,831 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1065 selfloop transitions, 701 changer transitions 149/1917 dead transitions. [2023-09-01 13:29:42,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1917 transitions, 59403 flow [2023-09-01 13:29:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:29:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:29:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 523 transitions. [2023-09-01 13:29:42,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49479659413434246 [2023-09-01 13:29:42,833 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 523 transitions. [2023-09-01 13:29:42,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 523 transitions. [2023-09-01 13:29:42,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:29:42,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 523 transitions. [2023-09-01 13:29:42,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,834 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:29:42,834 INFO L175 Difference]: Start difference. First operand has 592 places, 1442 transitions, 41737 flow. Second operand 7 states and 523 transitions. [2023-09-01 13:29:42,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1917 transitions, 59403 flow [2023-09-01 13:30:01,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1917 transitions, 58893 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-09-01 13:30:01,148 INFO L231 Difference]: Finished difference. Result has 580 places, 1641 transitions, 52029 flow [2023-09-01 13:30:01,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=41214, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52029, PETRI_PLACES=580, PETRI_TRANSITIONS=1641} [2023-09-01 13:30:01,149 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-09-01 13:30:01,150 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1641 transitions, 52029 flow [2023-09-01 13:30:01,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:01,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:30:01,150 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:30:01,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 13:30:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 13:30:01,356 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:30:01,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:30:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash -145152391, now seen corresponding path program 24 times [2023-09-01 13:30:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:30:01,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409925048] [2023-09-01 13:30:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:30:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:30:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:30:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:30:01,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409925048] [2023-09-01 13:30:01,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409925048] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:30:01,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671335835] [2023-09-01 13:30:01,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:30:01,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:30:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:30:01,524 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:30:01,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 13:30:01,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:30:01,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:30:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:30:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:30:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:01,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:30:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671335835] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:30:01,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:30:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-09-01 13:30:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444114640] [2023-09-01 13:30:01,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:30:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:30:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:30:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:30:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:30:02,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:30:02,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1641 transitions, 52029 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:02,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:30:02,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:30:02,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:30:15,981 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2023-09-01 13:30:15,981 INFO L131 PetriNetUnfolder]: For 6470012/6470012 co-relation queries the response was YES. [2023-09-01 13:30:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314644 conditions, 18621 events. 9340/18621 cut-off events. For 6470012/6470012 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 179437 event pairs, 1197 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 312947. Up to 6831 conditions per place. [2023-09-01 13:30:16,413 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2495 selfloop transitions, 630 changer transitions 2/3127 dead transitions. [2023-09-01 13:30:16,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3127 transitions, 101680 flow [2023-09-01 13:30:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 13:30:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 13:30:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1791 transitions. [2023-09-01 13:30:16,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45618950585838003 [2023-09-01 13:30:16,416 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1791 transitions. [2023-09-01 13:30:16,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1791 transitions. [2023-09-01 13:30:16,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:30:16,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1791 transitions. [2023-09-01 13:30:16,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 68.88461538461539) internal successors, (1791), 26 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:16,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:16,421 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:16,421 INFO L175 Difference]: Start difference. First operand has 580 places, 1641 transitions, 52029 flow. Second operand 26 states and 1791 transitions. [2023-09-01 13:30:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3127 transitions, 101680 flow [2023-09-01 13:30:51,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3127 transitions, 100162 flow, removed 692 selfloop flow, removed 16 redundant places. [2023-09-01 13:30:51,457 INFO L231 Difference]: Finished difference. Result has 582 places, 2016 transitions, 64382 flow [2023-09-01 13:30:51,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51163, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=64382, PETRI_PLACES=582, PETRI_TRANSITIONS=2016} [2023-09-01 13:30:51,460 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-09-01 13:30:51,460 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2016 transitions, 64382 flow [2023-09-01 13:30:51,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:30:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:30:51,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 13:30:51,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 13:30:51,666 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:30:51,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:30:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2084131937, now seen corresponding path program 25 times [2023-09-01 13:30:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:30:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813288371] [2023-09-01 13:30:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:30:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:30:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:30:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:30:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813288371] [2023-09-01 13:30:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813288371] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:30:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672586461] [2023-09-01 13:30:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:30:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:30:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:30:51,826 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:30:51,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 13:30:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:30:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:30:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:30:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:51,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:30:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:30:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672586461] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:30:52,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:30:52,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 13:30:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892141845] [2023-09-01 13:30:52,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:30:52,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:30:52,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:30:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:30:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:30:52,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:30:52,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2016 transitions, 64382 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:30:52,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:30:52,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:30:52,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:31:06,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:31:09,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:31:25,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:31:32,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:31:58,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:32:16,829 INFO L130 PetriNetUnfolder]: 10803/21822 cut-off events. [2023-09-01 13:32:16,829 INFO L131 PetriNetUnfolder]: For 7540293/7540293 co-relation queries the response was YES. [2023-09-01 13:32:17,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389578 conditions, 21822 events. 10803/21822 cut-off events. For 7540293/7540293 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 217628 event pairs, 354 based on Foata normal form. 84/21906 useless extension candidates. Maximal degree in co-relation 387839. Up to 4653 conditions per place. [2023-09-01 13:32:17,376 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 850 selfloop transitions, 3049 changer transitions 72/3971 dead transitions. [2023-09-01 13:32:17,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 3971 transitions, 134243 flow [2023-09-01 13:32:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-09-01 13:32:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-09-01 13:32:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 7840 transitions. [2023-09-01 13:32:17,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44759077414934917 [2023-09-01 13:32:17,384 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 7840 transitions. [2023-09-01 13:32:17,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 7840 transitions. [2023-09-01 13:32:17,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:17,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 7840 transitions. [2023-09-01 13:32:17,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 67.58620689655173) internal successors, (7840), 116 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:17,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 151.0) internal successors, (17667), 117 states have internal predecessors, (17667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:17,407 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 151.0) internal successors, (17667), 117 states have internal predecessors, (17667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:17,407 INFO L175 Difference]: Start difference. First operand has 582 places, 2016 transitions, 64382 flow. Second operand 116 states and 7840 transitions. [2023-09-01 13:32:17,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 3971 transitions, 134243 flow [2023-09-01 13:33:07,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 3971 transitions, 131663 flow, removed 1192 selfloop flow, removed 10 redundant places. [2023-09-01 13:33:07,328 INFO L231 Difference]: Finished difference. Result has 725 places, 3373 transitions, 119534 flow [2023-09-01 13:33:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=62622, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=119534, PETRI_PLACES=725, PETRI_TRANSITIONS=3373} [2023-09-01 13:33:07,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 705 predicate places. [2023-09-01 13:33:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 3373 transitions, 119534 flow [2023-09-01 13:33:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:33:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:33:07,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 13:33:07,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:33:07,532 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:33:07,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:33:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1255341621, now seen corresponding path program 26 times [2023-09-01 13:33:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:33:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017612306] [2023-09-01 13:33:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:33:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:33:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:33:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:33:07,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:33:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017612306] [2023-09-01 13:33:07,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017612306] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:33:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634067597] [2023-09-01 13:33:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:33:07,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:33:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:33:07,684 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:33:07,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 13:33:07,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:33:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:33:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:33:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:33:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:33:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:33:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:33:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634067597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:33:07,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:33:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-09-01 13:33:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155761642] [2023-09-01 13:33:07,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:33:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:33:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:33:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:33:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:33:08,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:33:08,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 3373 transitions, 119534 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:08,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:33:08,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:33:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:33:14,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:33:49,717 INFO L130 PetriNetUnfolder]: 12796/25904 cut-off events. [2023-09-01 13:33:49,718 INFO L131 PetriNetUnfolder]: For 17958409/17958409 co-relation queries the response was YES. [2023-09-01 13:33:50,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528102 conditions, 25904 events. 12796/25904 cut-off events. For 17958409/17958409 co-relation queries the response was YES. Maximal size of possible extension queue 1888. Compared 264920 event pairs, 1279 based on Foata normal form. 684/26588 useless extension candidates. Maximal degree in co-relation 525729. Up to 5769 conditions per place. [2023-09-01 13:33:50,962 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2475 selfloop transitions, 2098 changer transitions 90/4663 dead transitions. [2023-09-01 13:33:50,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 4663 transitions, 166954 flow [2023-09-01 13:33:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-09-01 13:33:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-09-01 13:33:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5111 transitions. [2023-09-01 13:33:50,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45130242825607064 [2023-09-01 13:33:50,967 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5111 transitions. [2023-09-01 13:33:50,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5111 transitions. [2023-09-01 13:33:50,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:33:50,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5111 transitions. [2023-09-01 13:33:50,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 68.14666666666666) internal successors, (5111), 75 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:50,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:50,982 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:50,982 INFO L175 Difference]: Start difference. First operand has 725 places, 3373 transitions, 119534 flow. Second operand 75 states and 5111 transitions. [2023-09-01 13:33:50,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 4663 transitions, 166954 flow [2023-09-01 13:36:27,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 4663 transitions, 150341 flow, removed 7948 selfloop flow, removed 25 redundant places. [2023-09-01 13:36:27,596 INFO L231 Difference]: Finished difference. Result has 809 places, 3951 transitions, 133539 flow [2023-09-01 13:36:27,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=106778, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=133539, PETRI_PLACES=809, PETRI_TRANSITIONS=3951} [2023-09-01 13:36:27,599 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 789 predicate places. [2023-09-01 13:36:27,599 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 3951 transitions, 133539 flow [2023-09-01 13:36:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:27,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:27,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 13:36:27,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:27,800 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:36:27,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2082942645, now seen corresponding path program 27 times [2023-09-01 13:36:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:27,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791771114] [2023-09-01 13:36:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:27,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791771114] [2023-09-01 13:36:27,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791771114] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:27,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825931133] [2023-09-01 13:36:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:36:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:27,961 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:27,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 13:36:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:36:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:36:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:28,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825931133] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:28,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:28,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 13:36:28,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586225578] [2023-09-01 13:36:28,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:28,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:36:28,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:28,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:36:28,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:36:28,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:36:28,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 3951 transitions, 133539 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:28,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:28,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:36:28,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:37:43,935 INFO L130 PetriNetUnfolder]: 14047/28734 cut-off events. [2023-09-01 13:37:43,935 INFO L131 PetriNetUnfolder]: For 23257351/23257351 co-relation queries the response was YES. [2023-09-01 13:37:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627737 conditions, 28734 events. 14047/28734 cut-off events. For 23257351/23257351 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 299515 event pairs, 872 based on Foata normal form. 276/29010 useless extension candidates. Maximal degree in co-relation 626047. Up to 6131 conditions per place. [2023-09-01 13:37:45,266 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1535 selfloop transitions, 3327 changer transitions 25/4887 dead transitions. [2023-09-01 13:37:45,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 4887 transitions, 168730 flow [2023-09-01 13:37:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-09-01 13:37:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-09-01 13:37:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6368 transitions. [2023-09-01 13:37:45,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534643594673503 [2023-09-01 13:37:45,271 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6368 transitions. [2023-09-01 13:37:45,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6368 transitions. [2023-09-01 13:37:45,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:37:45,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6368 transitions. [2023-09-01 13:37:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 68.47311827956989) internal successors, (6368), 93 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:45,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:45,285 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:45,285 INFO L175 Difference]: Start difference. First operand has 809 places, 3951 transitions, 133539 flow. Second operand 93 states and 6368 transitions. [2023-09-01 13:37:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 4887 transitions, 168730 flow [2023-09-01 13:40:50,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 4887 transitions, 163504 flow, removed 2233 selfloop flow, removed 24 redundant places. [2023-09-01 13:40:50,628 INFO L231 Difference]: Finished difference. Result has 900 places, 4258 transitions, 147102 flow [2023-09-01 13:40:50,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=128045, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3022, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=147102, PETRI_PLACES=900, PETRI_TRANSITIONS=4258} [2023-09-01 13:40:50,633 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 880 predicate places. [2023-09-01 13:40:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 4258 transitions, 147102 flow [2023-09-01 13:40:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:50,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:40:50,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:40:50,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 13:40:50,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 13:40:50,844 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:40:50,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:40:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1763070637, now seen corresponding path program 28 times [2023-09-01 13:40:50,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:40:50,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956441865] [2023-09-01 13:40:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:40:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:40:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:40:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:51,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:40:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956441865] [2023-09-01 13:40:51,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956441865] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:40:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140073099] [2023-09-01 13:40:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:40:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:40:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:40:51,019 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:40:51,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 13:40:51,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:40:51,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:40:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 13:40:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:40:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:51,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:40:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140073099] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:40:51,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:40:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-09-01 13:40:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584045105] [2023-09-01 13:40:51,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:40:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:40:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:40:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:40:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:40:51,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-09-01 13:40:51,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 900 places, 4258 transitions, 147102 flow. Second operand has 20 states, 20 states have (on average 63.7) internal successors, (1274), 20 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:51,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:40:51,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-09-01 13:40:51,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15