./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/weaver/popl20-figure1.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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:11:40,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:11:40,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:11:40,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:11:40,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:11:40,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:11:40,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:11:40,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:11:40,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:11:40,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:11:40,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:11:40,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:11:40,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:11:40,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:11:40,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:11:40,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:11:40,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:11:40,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:11:40,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:11:40,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:11:40,706 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:11:40,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:11:40,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:11:40,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:11:40,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:11:40,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:11:40,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:11:40,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:11:40,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:11:40,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:11:40,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:11:40,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:11:40,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:11:40,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:11:40,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:11:40,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:11:40,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:11:40,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:11:40,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:11:40,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:11:40,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:11:40,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:11:40,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:11:40,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:11:40,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:11:40,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:11:40,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:11:40,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:11:40,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:11:40,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:11:40,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:11:40,762 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:11:40,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:11:40,763 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:11:40,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:11:40,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:11:40,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:11:40,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:11:40,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:11:40,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:11:40,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:11:40,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:11:40,765 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:11:40,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:11:40,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:11:40,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:11:40,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:11:40,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:11:40,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:11:40,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:11:40,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:11:40,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:11:40,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:11:40,767 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:11:40,767 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:11:40,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:11:40,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-07-13 22:11:40,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:11:41,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:11:41,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:11:41,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:11:41,010 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:11:41,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-13 22:11:41,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167819a16/bd905c221ebc47a4997763d6b0bdfa57/FLAGf74859795 [2022-07-13 22:11:41,449 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:11:41,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-13 22:11:41,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167819a16/bd905c221ebc47a4997763d6b0bdfa57/FLAGf74859795 [2022-07-13 22:11:41,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167819a16/bd905c221ebc47a4997763d6b0bdfa57 [2022-07-13 22:11:41,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:11:41,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:11:41,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:11:41,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:11:41,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:11:41,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a7b504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41, skipping insertion in model container [2022-07-13 22:11:41,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:11:41,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:11:41,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-07-13 22:11:41,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:11:41,674 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:11:41,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-07-13 22:11:41,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:11:41,721 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:11:41,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41 WrapperNode [2022-07-13 22:11:41,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:11:41,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:11:41,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:11:41,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:11:41,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,759 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-07-13 22:11:41,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:11:41,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:11:41,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:11:41,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:11:41,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:11:41,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:11:41,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:11:41,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:11:41,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (1/1) ... [2022-07-13 22:11:41,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:11:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:41,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:11:41,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:11:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:11:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:11:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:11:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:11:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:11:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:11:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:11:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:11:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:11:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:11:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:11:41,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:11:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:11:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:11:41,855 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:11:41,939 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:11:41,940 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:11:42,113 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:11:42,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:11:42,141 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:11:42,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:11:42 BoogieIcfgContainer [2022-07-13 22:11:42,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:11:42,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:11:42,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:11:42,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:11:42,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:11:41" (1/3) ... [2022-07-13 22:11:42,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abd368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:11:42, skipping insertion in model container [2022-07-13 22:11:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:11:41" (2/3) ... [2022-07-13 22:11:42,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abd368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:11:42, skipping insertion in model container [2022-07-13 22:11:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:11:42" (3/3) ... [2022-07-13 22:11:42,152 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-07-13 22:11:42,162 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:11:42,172 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:11:42,172 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:11:42,172 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:11:42,218 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:11:42,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-07-13 22:11:42,277 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-07-13 22:11:42,277 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:11:42,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-07-13 22:11:42,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-07-13 22:11:42,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-07-13 22:11:42,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:11:42,299 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59df95c0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45946005 [2022-07-13 22:11:42,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:11:42,320 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-07-13 22:11:42,323 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:11:42,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:42,324 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:42,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash -756496266, now seen corresponding path program 1 times [2022-07-13 22:11:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610980617] [2022-07-13 22:11:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:42,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:42,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610980617] [2022-07-13 22:11:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610980617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:42,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:42,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:11:42,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308938274] [2022-07-13 22:11:42,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:11:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:11:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:11:42,601 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 77 [2022-07-13 22:11:42,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:42,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 77 [2022-07-13 22:11:42,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:42,661 INFO L129 PetriNetUnfolder]: 11/96 cut-off events. [2022-07-13 22:11:42,662 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-13 22:11:42,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 96 events. 11/96 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 3 based on Foata normal form. 10/98 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-07-13 22:11:42,665 INFO L132 encePairwiseOnDemand]: 74/77 looper letters, 6 selfloop transitions, 0 changer transitions 1/63 dead transitions. [2022-07-13 22:11:42,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 150 flow [2022-07-13 22:11:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:11:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:11:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2022-07-13 22:11:42,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-07-13 22:11:42,679 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2022-07-13 22:11:42,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2022-07-13 22:11:42,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:42,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2022-07-13 22:11:42,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,695 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,697 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 2 states and 143 transitions. [2022-07-13 22:11:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 150 flow [2022-07-13 22:11:42,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:11:42,708 INFO L242 Difference]: Finished difference. Result has 65 places, 62 transitions, 128 flow [2022-07-13 22:11:42,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-07-13 22:11:42,718 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2022-07-13 22:11:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 128 flow [2022-07-13 22:11:42,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:42,720 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:11:42,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2091830959, now seen corresponding path program 1 times [2022-07-13 22:11:42,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:42,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035456332] [2022-07-13 22:11:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:42,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:42,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035456332] [2022-07-13 22:11:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035456332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:42,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:42,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:11:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049127678] [2022-07-13 22:11:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:11:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:11:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:11:42,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-13 22:11:42,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:42,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:42,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-13 22:11:42,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:43,061 INFO L129 PetriNetUnfolder]: 8/99 cut-off events. [2022-07-13 22:11:43,061 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 22:11:43,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 99 events. 8/99 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 171 event pairs, 1 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 127. Up to 18 conditions per place. [2022-07-13 22:11:43,063 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 11 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2022-07-13 22:11:43,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 181 flow [2022-07-13 22:11:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:11:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:11:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2022-07-13 22:11:43,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2022-07-13 22:11:43,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2022-07-13 22:11:43,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2022-07-13 22:11:43,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:43,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2022-07-13 22:11:43,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,076 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,076 INFO L186 Difference]: Start difference. First operand has 65 places, 62 transitions, 128 flow. Second operand 5 states and 325 transitions. [2022-07-13 22:11:43,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 181 flow [2022-07-13 22:11:43,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:11:43,079 INFO L242 Difference]: Finished difference. Result has 71 places, 63 transitions, 146 flow [2022-07-13 22:11:43,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2022-07-13 22:11:43,080 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-07-13 22:11:43,080 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 146 flow [2022-07-13 22:11:43,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:43,081 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:43,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:11:43,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2038057157, now seen corresponding path program 1 times [2022-07-13 22:11:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:43,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752462465] [2022-07-13 22:11:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752462465] [2022-07-13 22:11:43,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752462465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116043817] [2022-07-13 22:11:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:43,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:43,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:11:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:11:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:43,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:43,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116043817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:43,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:43,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-13 22:11:43,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476304450] [2022-07-13 22:11:43,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:11:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:11:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:11:43,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:43,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:43,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:43,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:43,692 INFO L129 PetriNetUnfolder]: 110/320 cut-off events. [2022-07-13 22:11:43,692 INFO L130 PetriNetUnfolder]: For 27/35 co-relation queries the response was YES. [2022-07-13 22:11:43,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 320 events. 110/320 cut-off events. For 27/35 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1435 event pairs, 11 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 611. Up to 41 conditions per place. [2022-07-13 22:11:43,695 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 24 changer transitions 5/125 dead transitions. [2022-07-13 22:11:43,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 461 flow [2022-07-13 22:11:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:11:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:11:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-07-13 22:11:43,698 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-07-13 22:11:43,699 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-07-13 22:11:43,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-07-13 22:11:43,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:43,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-07-13 22:11:43,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,705 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,705 INFO L186 Difference]: Start difference. First operand has 71 places, 63 transitions, 146 flow. Second operand 14 states and 854 transitions. [2022-07-13 22:11:43,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 461 flow [2022-07-13 22:11:43,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:11:43,709 INFO L242 Difference]: Finished difference. Result has 86 places, 87 transitions, 288 flow [2022-07-13 22:11:43,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=288, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-07-13 22:11:43,710 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2022-07-13 22:11:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 288 flow [2022-07-13 22:11:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:43,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:43,711 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:43,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:43,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:43,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -465536495, now seen corresponding path program 2 times [2022-07-13 22:11:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855427206] [2022-07-13 22:11:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855427206] [2022-07-13 22:11:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855427206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:43,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:43,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:11:43,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961980210] [2022-07-13 22:11:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:11:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:11:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:11:44,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:44,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:44,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:44,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:44,086 INFO L129 PetriNetUnfolder]: 116/321 cut-off events. [2022-07-13 22:11:44,087 INFO L130 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-07-13 22:11:44,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 321 events. 116/321 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1414 event pairs, 48 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 869. Up to 162 conditions per place. [2022-07-13 22:11:44,090 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 50 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-07-13 22:11:44,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 504 flow [2022-07-13 22:11:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:11:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:11:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-07-13 22:11:44,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-07-13 22:11:44,092 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-07-13 22:11:44,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-07-13 22:11:44,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:44,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-07-13 22:11:44,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,095 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,095 INFO L186 Difference]: Start difference. First operand has 86 places, 87 transitions, 288 flow. Second operand 5 states and 317 transitions. [2022-07-13 22:11:44,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 504 flow [2022-07-13 22:11:44,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 502 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 22:11:44,100 INFO L242 Difference]: Finished difference. Result has 92 places, 92 transitions, 357 flow [2022-07-13 22:11:44,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-07-13 22:11:44,101 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2022-07-13 22:11:44,101 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 357 flow [2022-07-13 22:11:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:44,102 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:11:44,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 88617565, now seen corresponding path program 3 times [2022-07-13 22:11:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223061438] [2022-07-13 22:11:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223061438] [2022-07-13 22:11:44,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223061438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947581541] [2022-07-13 22:11:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:11:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:44,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:11:44,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:11:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:11:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947581541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 22:11:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802545159] [2022-07-13 22:11:44,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:11:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:11:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:11:44,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:44,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:44,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:44,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:44,522 INFO L129 PetriNetUnfolder]: 166/507 cut-off events. [2022-07-13 22:11:44,522 INFO L130 PetriNetUnfolder]: For 671/673 co-relation queries the response was YES. [2022-07-13 22:11:44,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 507 events. 166/507 cut-off events. For 671/673 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2613 event pairs, 36 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 1363. Up to 114 conditions per place. [2022-07-13 22:11:44,527 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-07-13 22:11:44,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 839 flow [2022-07-13 22:11:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:11:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:11:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-07-13 22:11:44,530 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-07-13 22:11:44,530 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-07-13 22:11:44,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-07-13 22:11:44,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:44,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-07-13 22:11:44,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,534 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,534 INFO L186 Difference]: Start difference. First operand has 92 places, 92 transitions, 357 flow. Second operand 9 states and 564 transitions. [2022-07-13 22:11:44,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 839 flow [2022-07-13 22:11:44,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 22:11:44,541 INFO L242 Difference]: Finished difference. Result has 104 places, 112 transitions, 598 flow [2022-07-13 22:11:44,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2022-07-13 22:11:44,543 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-07-13 22:11:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 598 flow [2022-07-13 22:11:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:44,544 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:44,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:44,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1808089009, now seen corresponding path program 4 times [2022-07-13 22:11:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897478171] [2022-07-13 22:11:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897478171] [2022-07-13 22:11:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897478171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662981395] [2022-07-13 22:11:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:11:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:44,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:44,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:11:44,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:11:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:11:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:44,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662981395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:44,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:44,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 22:11:44,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042514551] [2022-07-13 22:11:44,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:44,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:11:44,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:44,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:11:44,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-13 22:11:44,979 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:44,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:44,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:44,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:44,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:45,227 INFO L129 PetriNetUnfolder]: 201/614 cut-off events. [2022-07-13 22:11:45,228 INFO L130 PetriNetUnfolder]: For 1320/1324 co-relation queries the response was YES. [2022-07-13 22:11:45,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 614 events. 201/614 cut-off events. For 1320/1324 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3490 event pairs, 21 based on Foata normal form. 11/619 useless extension candidates. Maximal degree in co-relation 1829. Up to 106 conditions per place. [2022-07-13 22:11:45,233 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 63 selfloop transitions, 52 changer transitions 1/160 dead transitions. [2022-07-13 22:11:45,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1069 flow [2022-07-13 22:11:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 22:11:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 22:11:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-07-13 22:11:45,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-07-13 22:11:45,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-07-13 22:11:45,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-07-13 22:11:45,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:45,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-07-13 22:11:45,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,240 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,240 INFO L186 Difference]: Start difference. First operand has 104 places, 112 transitions, 598 flow. Second operand 12 states and 743 transitions. [2022-07-13 22:11:45,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1069 flow [2022-07-13 22:11:45,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1063 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 22:11:45,248 INFO L242 Difference]: Finished difference. Result has 118 places, 122 transitions, 800 flow [2022-07-13 22:11:45,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-07-13 22:11:45,249 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-07-13 22:11:45,249 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 800 flow [2022-07-13 22:11:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:45,250 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:45,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:45,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:45,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1386634823, now seen corresponding path program 5 times [2022-07-13 22:11:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097888018] [2022-07-13 22:11:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097888018] [2022-07-13 22:11:45,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097888018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:45,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:45,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:11:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804505584] [2022-07-13 22:11:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:45,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:11:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:11:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:11:45,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:45,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:45,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:45,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:45,639 INFO L129 PetriNetUnfolder]: 200/606 cut-off events. [2022-07-13 22:11:45,639 INFO L130 PetriNetUnfolder]: For 1751/1755 co-relation queries the response was YES. [2022-07-13 22:11:45,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 606 events. 200/606 cut-off events. For 1751/1755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3432 event pairs, 92 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1993. Up to 248 conditions per place. [2022-07-13 22:11:45,645 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 75 selfloop transitions, 22 changer transitions 1/142 dead transitions. [2022-07-13 22:11:45,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1121 flow [2022-07-13 22:11:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:11:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:11:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-07-13 22:11:45,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-07-13 22:11:45,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 369 transitions. [2022-07-13 22:11:45,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 369 transitions. [2022-07-13 22:11:45,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:45,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 369 transitions. [2022-07-13 22:11:45,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.5) internal successors, (369), 6 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,651 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,651 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 800 flow. Second operand 6 states and 369 transitions. [2022-07-13 22:11:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1121 flow [2022-07-13 22:11:45,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1094 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-07-13 22:11:45,661 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 866 flow [2022-07-13 22:11:45,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-13 22:11:45,662 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-07-13 22:11:45,662 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 866 flow [2022-07-13 22:11:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:45,663 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:45,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:11:45,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash -172972305, now seen corresponding path program 6 times [2022-07-13 22:11:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780910886] [2022-07-13 22:11:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:45,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780910886] [2022-07-13 22:11:45,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780910886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:11:45,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:11:45,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:11:45,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826986967] [2022-07-13 22:11:45,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:11:45,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:11:45,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:11:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:11:45,725 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-13 22:11:45,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:45,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-13 22:11:45,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:45,851 INFO L129 PetriNetUnfolder]: 199/571 cut-off events. [2022-07-13 22:11:45,851 INFO L130 PetriNetUnfolder]: For 1971/1975 co-relation queries the response was YES. [2022-07-13 22:11:45,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 571 events. 199/571 cut-off events. For 1971/1975 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3133 event pairs, 90 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2007. Up to 231 conditions per place. [2022-07-13 22:11:45,857 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-07-13 22:11:45,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1127 flow [2022-07-13 22:11:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:11:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:11:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-07-13 22:11:45,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-13 22:11:45,859 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-07-13 22:11:45,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-07-13 22:11:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-07-13 22:11:45,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,862 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,862 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 866 flow. Second operand 5 states and 315 transitions. [2022-07-13 22:11:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1127 flow [2022-07-13 22:11:45,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-13 22:11:45,877 INFO L242 Difference]: Finished difference. Result has 123 places, 122 transitions, 855 flow [2022-07-13 22:11:45,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-07-13 22:11:45,879 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2022-07-13 22:11:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 855 flow [2022-07-13 22:11:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:45,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:45,880 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:11:45,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489239, now seen corresponding path program 1 times [2022-07-13 22:11:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161894838] [2022-07-13 22:11:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:11:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161894838] [2022-07-13 22:11:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161894838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016509485] [2022-07-13 22:11:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:45,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:45,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:11:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:11:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:11:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:11:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016509485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-13 22:11:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687246425] [2022-07-13 22:11:46,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:11:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:11:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:11:46,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-13 22:11:46,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:46,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-13 22:11:46,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:46,277 INFO L129 PetriNetUnfolder]: 114/633 cut-off events. [2022-07-13 22:11:46,278 INFO L130 PetriNetUnfolder]: For 1210/1248 co-relation queries the response was YES. [2022-07-13 22:11:46,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 633 events. 114/633 cut-off events. For 1210/1248 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4261 event pairs, 16 based on Foata normal form. 19/640 useless extension candidates. Maximal degree in co-relation 1726. Up to 80 conditions per place. [2022-07-13 22:11:46,283 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-07-13 22:11:46,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 945 flow [2022-07-13 22:11:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:11:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:11:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-07-13 22:11:46,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-07-13 22:11:46,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-07-13 22:11:46,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-07-13 22:11:46,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:46,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-07-13 22:11:46,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,289 INFO L186 Difference]: Start difference. First operand has 123 places, 122 transitions, 855 flow. Second operand 6 states and 395 transitions. [2022-07-13 22:11:46,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 945 flow [2022-07-13 22:11:46,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 837 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-07-13 22:11:46,298 INFO L242 Difference]: Finished difference. Result has 119 places, 124 transitions, 779 flow [2022-07-13 22:11:46,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-07-13 22:11:46,299 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2022-07-13 22:11:46,299 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 779 flow [2022-07-13 22:11:46,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:46,300 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:46,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:46,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 886319805, now seen corresponding path program 2 times [2022-07-13 22:11:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048219507] [2022-07-13 22:11:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048219507] [2022-07-13 22:11:46,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048219507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123979217] [2022-07-13 22:11:46,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:11:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:46,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:46,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:11:46,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:11:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:46,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123979217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:46,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-13 22:11:46,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960155838] [2022-07-13 22:11:46,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:11:46,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:11:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:11:46,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:46,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 779 flow. Second operand has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:46,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:46,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:46,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:47,316 INFO L129 PetriNetUnfolder]: 478/1432 cut-off events. [2022-07-13 22:11:47,316 INFO L130 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2022-07-13 22:11:47,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1432 events. 478/1432 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10471 event pairs, 159 based on Foata normal form. 1/1424 useless extension candidates. Maximal degree in co-relation 4656. Up to 556 conditions per place. [2022-07-13 22:11:47,329 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 74 selfloop transitions, 47 changer transitions 8/171 dead transitions. [2022-07-13 22:11:47,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1299 flow [2022-07-13 22:11:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:11:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:11:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-07-13 22:11:47,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-13 22:11:47,332 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-07-13 22:11:47,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-07-13 22:11:47,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:47,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-07-13 22:11:47,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:47,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:47,339 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:47,339 INFO L186 Difference]: Start difference. First operand has 119 places, 124 transitions, 779 flow. Second operand 16 states and 924 transitions. [2022-07-13 22:11:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1299 flow [2022-07-13 22:11:47,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 1283 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-13 22:11:47,348 INFO L242 Difference]: Finished difference. Result has 138 places, 137 transitions, 1000 flow [2022-07-13 22:11:47,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2022-07-13 22:11:47,350 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2022-07-13 22:11:47,350 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1000 flow [2022-07-13 22:11:47,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:47,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:47,350 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:47,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 22:11:47,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -247580723, now seen corresponding path program 3 times [2022-07-13 22:11:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250619017] [2022-07-13 22:11:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:47,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250619017] [2022-07-13 22:11:47,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250619017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:47,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650787149] [2022-07-13 22:11:47,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:11:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:47,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:11:47,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:11:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:47,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:47,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650787149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:47,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:47,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-13 22:11:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660828946] [2022-07-13 22:11:47,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:47,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:11:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:11:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:11:47,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:47,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1000 flow. Second operand has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 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) [2022-07-13 22:11:47,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:47,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:47,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:48,531 INFO L129 PetriNetUnfolder]: 637/1823 cut-off events. [2022-07-13 22:11:48,531 INFO L130 PetriNetUnfolder]: For 5334/5334 co-relation queries the response was YES. [2022-07-13 22:11:48,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 1823 events. 637/1823 cut-off events. For 5334/5334 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13817 event pairs, 119 based on Foata normal form. 17/1832 useless extension candidates. Maximal degree in co-relation 6858. Up to 359 conditions per place. [2022-07-13 22:11:48,551 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 124 selfloop transitions, 120 changer transitions 30/316 dead transitions. [2022-07-13 22:11:48,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 316 transitions, 2973 flow [2022-07-13 22:11:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 22:11:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-13 22:11:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-07-13 22:11:48,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-07-13 22:11:48,555 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-07-13 22:11:48,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-07-13 22:11:48,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-07-13 22:11:48,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:48,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:48,588 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:48,589 INFO L186 Difference]: Start difference. First operand has 138 places, 137 transitions, 1000 flow. Second operand 23 states and 1355 transitions. [2022-07-13 22:11:48,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 316 transitions, 2973 flow [2022-07-13 22:11:48,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 316 transitions, 2872 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-13 22:11:48,608 INFO L242 Difference]: Finished difference. Result has 164 places, 208 transitions, 1906 flow [2022-07-13 22:11:48,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1906, PETRI_PLACES=164, PETRI_TRANSITIONS=208} [2022-07-13 22:11:48,609 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2022-07-13 22:11:48,609 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 208 transitions, 1906 flow [2022-07-13 22:11:48,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 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) [2022-07-13 22:11:48,610 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:48,610 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:48,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 22:11:48,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:48,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -125754799, now seen corresponding path program 4 times [2022-07-13 22:11:48,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:48,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828969977] [2022-07-13 22:11:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:48,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828969977] [2022-07-13 22:11:48,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828969977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:48,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268396714] [2022-07-13 22:11:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:11:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:48,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:48,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:11:48,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:11:48,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:49,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:49,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268396714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:49,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:49,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:11:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752863177] [2022-07-13 22:11:49,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:11:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:11:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:11:49,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:49,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 208 transitions, 1906 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:49,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:49,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:49,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:50,083 INFO L129 PetriNetUnfolder]: 886/2464 cut-off events. [2022-07-13 22:11:50,083 INFO L130 PetriNetUnfolder]: For 11800/11800 co-relation queries the response was YES. [2022-07-13 22:11:50,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2464 events. 886/2464 cut-off events. For 11800/11800 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19710 event pairs, 97 based on Foata normal form. 21/2472 useless extension candidates. Maximal degree in co-relation 10896. Up to 401 conditions per place. [2022-07-13 22:11:50,116 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 151 selfloop transitions, 203 changer transitions 3/399 dead transitions. [2022-07-13 22:11:50,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 399 transitions, 4299 flow [2022-07-13 22:11:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 22:11:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 22:11:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-07-13 22:11:50,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-07-13 22:11:50,121 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-07-13 22:11:50,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-07-13 22:11:50,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:50,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-07-13 22:11:50,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,129 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,130 INFO L186 Difference]: Start difference. First operand has 164 places, 208 transitions, 1906 flow. Second operand 30 states and 1753 transitions. [2022-07-13 22:11:50,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 399 transitions, 4299 flow [2022-07-13 22:11:50,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 399 transitions, 4204 flow, removed 45 selfloop flow, removed 2 redundant places. [2022-07-13 22:11:50,176 INFO L242 Difference]: Finished difference. Result has 205 places, 301 transitions, 3478 flow [2022-07-13 22:11:50,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3478, PETRI_PLACES=205, PETRI_TRANSITIONS=301} [2022-07-13 22:11:50,177 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 137 predicate places. [2022-07-13 22:11:50,177 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 301 transitions, 3478 flow [2022-07-13 22:11:50,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:50,178 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:50,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:50,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:50,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash 38557705, now seen corresponding path program 5 times [2022-07-13 22:11:50,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847954889] [2022-07-13 22:11:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847954889] [2022-07-13 22:11:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847954889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576465896] [2022-07-13 22:11:50,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:11:50,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:50,476 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:50,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:11:50,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:11:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:50,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:50,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576465896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:50,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:50,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-13 22:11:50,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976630806] [2022-07-13 22:11:50,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:50,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 22:11:50,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 22:11:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:11:50,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:50,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 301 transitions, 3478 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:50,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:50,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:51,929 INFO L129 PetriNetUnfolder]: 1071/3017 cut-off events. [2022-07-13 22:11:51,929 INFO L130 PetriNetUnfolder]: For 25405/25405 co-relation queries the response was YES. [2022-07-13 22:11:51,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15872 conditions, 3017 events. 1071/3017 cut-off events. For 25405/25405 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25420 event pairs, 75 based on Foata normal form. 3/3014 useless extension candidates. Maximal degree in co-relation 15819. Up to 314 conditions per place. [2022-07-13 22:11:51,980 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 210 selfloop transitions, 255 changer transitions 10/517 dead transitions. [2022-07-13 22:11:51,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 517 transitions, 6632 flow [2022-07-13 22:11:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 22:11:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 22:11:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-07-13 22:11:51,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-07-13 22:11:51,985 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-07-13 22:11:51,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-07-13 22:11:51,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:51,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-07-13 22:11:51,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:51,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:52,000 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:52,000 INFO L186 Difference]: Start difference. First operand has 205 places, 301 transitions, 3478 flow. Second operand 47 states and 2713 transitions. [2022-07-13 22:11:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 517 transitions, 6632 flow [2022-07-13 22:11:52,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 517 transitions, 6404 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-07-13 22:11:52,116 INFO L242 Difference]: Finished difference. Result has 254 places, 390 transitions, 5130 flow [2022-07-13 22:11:52,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5130, PETRI_PLACES=254, PETRI_TRANSITIONS=390} [2022-07-13 22:11:52,117 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 186 predicate places. [2022-07-13 22:11:52,117 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 390 transitions, 5130 flow [2022-07-13 22:11:52,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:52,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:52,118 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:52,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:52,331 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,SelfDestructingSolverStorable12 [2022-07-13 22:11:52,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:52,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1627335489, now seen corresponding path program 6 times [2022-07-13 22:11:52,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:52,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673988775] [2022-07-13 22:11:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:52,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673988775] [2022-07-13 22:11:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673988775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302305399] [2022-07-13 22:11:52,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:11:52,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:52,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:52,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:11:52,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 22:11:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:52,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302305399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:52,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:11:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492697235] [2022-07-13 22:11:52,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:11:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:11:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:11:52,684 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:52,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 390 transitions, 5130 flow. Second operand has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:52,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:52,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:52,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:54,193 INFO L129 PetriNetUnfolder]: 1271/3648 cut-off events. [2022-07-13 22:11:54,193 INFO L130 PetriNetUnfolder]: For 49999/49999 co-relation queries the response was YES. [2022-07-13 22:11:54,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22008 conditions, 3648 events. 1271/3648 cut-off events. For 49999/49999 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32683 event pairs, 100 based on Foata normal form. 19/3656 useless extension candidates. Maximal degree in co-relation 21944. Up to 573 conditions per place. [2022-07-13 22:11:54,302 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 185 selfloop transitions, 333 changer transitions 4/564 dead transitions. [2022-07-13 22:11:54,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 564 transitions, 8240 flow [2022-07-13 22:11:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 22:11:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 22:11:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-07-13 22:11:54,306 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-07-13 22:11:54,306 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-07-13 22:11:54,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-07-13 22:11:54,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:54,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-07-13 22:11:54,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:54,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:54,317 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:54,317 INFO L186 Difference]: Start difference. First operand has 254 places, 390 transitions, 5130 flow. Second operand 41 states and 2368 transitions. [2022-07-13 22:11:54,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 564 transitions, 8240 flow [2022-07-13 22:11:54,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 564 transitions, 7698 flow, removed 227 selfloop flow, removed 2 redundant places. [2022-07-13 22:11:54,544 INFO L242 Difference]: Finished difference. Result has 300 places, 456 transitions, 6627 flow [2022-07-13 22:11:54,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6627, PETRI_PLACES=300, PETRI_TRANSITIONS=456} [2022-07-13 22:11:54,545 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 232 predicate places. [2022-07-13 22:11:54,545 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 456 transitions, 6627 flow [2022-07-13 22:11:54,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:54,546 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:54,546 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:54,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:54,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:11:54,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -584043037, now seen corresponding path program 7 times [2022-07-13 22:11:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:54,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755860232] [2022-07-13 22:11:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:54,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755860232] [2022-07-13 22:11:54,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755860232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:54,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942447790] [2022-07-13 22:11:54,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:11:54,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:54,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:54,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:11:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:54,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:55,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:55,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942447790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:55,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:55,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-13 22:11:55,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102813179] [2022-07-13 22:11:55,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 22:11:55,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 22:11:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:11:55,069 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:55,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 456 transitions, 6627 flow. Second operand has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:55,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:55,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:55,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:56,958 INFO L129 PetriNetUnfolder]: 1311/3738 cut-off events. [2022-07-13 22:11:56,959 INFO L130 PetriNetUnfolder]: For 57926/57926 co-relation queries the response was YES. [2022-07-13 22:11:56,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3738 events. 1311/3738 cut-off events. For 57926/57926 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33721 event pairs, 95 based on Foata normal form. 27/3748 useless extension candidates. Maximal degree in co-relation 23428. Up to 471 conditions per place. [2022-07-13 22:11:57,019 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 238 selfloop transitions, 361 changer transitions 24/665 dead transitions. [2022-07-13 22:11:57,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 665 transitions, 10102 flow [2022-07-13 22:11:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-13 22:11:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-13 22:11:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-07-13 22:11:57,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-07-13 22:11:57,025 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-07-13 22:11:57,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-07-13 22:11:57,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:57,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-07-13 22:11:57,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,038 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,038 INFO L186 Difference]: Start difference. First operand has 300 places, 456 transitions, 6627 flow. Second operand 68 states and 3914 transitions. [2022-07-13 22:11:57,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 665 transitions, 10102 flow [2022-07-13 22:11:57,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 665 transitions, 9623 flow, removed 100 selfloop flow, removed 23 redundant places. [2022-07-13 22:11:57,251 INFO L242 Difference]: Finished difference. Result has 352 places, 491 transitions, 7737 flow [2022-07-13 22:11:57,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7737, PETRI_PLACES=352, PETRI_TRANSITIONS=491} [2022-07-13 22:11:57,252 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-07-13 22:11:57,252 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 491 transitions, 7737 flow [2022-07-13 22:11:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:57,253 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:57,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:57,459 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,SelfDestructingSolverStorable14 [2022-07-13 22:11:57,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -483096289, now seen corresponding path program 8 times [2022-07-13 22:11:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109068440] [2022-07-13 22:11:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:57,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109068440] [2022-07-13 22:11:57,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109068440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258548966] [2022-07-13 22:11:57,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:11:57,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:57,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:57,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:57,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:11:57,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:11:57,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:11:57,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:57,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:11:57,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258548966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:57,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:57,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-13 22:11:57,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602300682] [2022-07-13 22:11:57,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:11:57,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:11:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:11:57,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:11:57,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 491 transitions, 7737 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:57,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:11:57,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:00,016 INFO L129 PetriNetUnfolder]: 2281/6793 cut-off events. [2022-07-13 22:12:00,016 INFO L130 PetriNetUnfolder]: For 113952/113952 co-relation queries the response was YES. [2022-07-13 22:12:00,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43102 conditions, 6793 events. 2281/6793 cut-off events. For 113952/113952 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68200 event pairs, 353 based on Foata normal form. 6/6734 useless extension candidates. Maximal degree in co-relation 43024. Up to 1557 conditions per place. [2022-07-13 22:12:00,102 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 525 selfloop transitions, 343 changer transitions 12/922 dead transitions. [2022-07-13 22:12:00,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 922 transitions, 15651 flow [2022-07-13 22:12:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 22:12:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-13 22:12:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3315 transitions. [2022-07-13 22:12:00,106 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7552973342447027 [2022-07-13 22:12:00,106 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3315 transitions. [2022-07-13 22:12:00,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3315 transitions. [2022-07-13 22:12:00,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:00,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3315 transitions. [2022-07-13 22:12:00,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:00,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:00,117 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:00,118 INFO L186 Difference]: Start difference. First operand has 352 places, 491 transitions, 7737 flow. Second operand 57 states and 3315 transitions. [2022-07-13 22:12:00,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 922 transitions, 15651 flow [2022-07-13 22:12:00,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 922 transitions, 15073 flow, removed 98 selfloop flow, removed 33 redundant places. [2022-07-13 22:12:00,628 INFO L242 Difference]: Finished difference. Result has 406 places, 728 transitions, 12514 flow [2022-07-13 22:12:00,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=7336, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12514, PETRI_PLACES=406, PETRI_TRANSITIONS=728} [2022-07-13 22:12:00,629 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 338 predicate places. [2022-07-13 22:12:00,629 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 728 transitions, 12514 flow [2022-07-13 22:12:00,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:00,630 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:00,630 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:00,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:00,853 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,SelfDestructingSolverStorable15 [2022-07-13 22:12:00,853 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:00,854 INFO L85 PathProgramCache]: Analyzing trace with hash 571912985, now seen corresponding path program 9 times [2022-07-13 22:12:00,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:00,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497095693] [2022-07-13 22:12:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:00,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497095693] [2022-07-13 22:12:00,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497095693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831647964] [2022-07-13 22:12:00,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:12:00,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:00,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:00,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:00,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:12:00,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:12:00,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:12:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:01,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:01,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831647964] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:01,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:01,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 22:12:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797141379] [2022-07-13 22:12:01,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:12:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:12:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:12:01,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:12:01,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 728 transitions, 12514 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:01,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:01,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:12:01,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:03,305 INFO L129 PetriNetUnfolder]: 2300/6854 cut-off events. [2022-07-13 22:12:03,305 INFO L130 PetriNetUnfolder]: For 156979/156979 co-relation queries the response was YES. [2022-07-13 22:12:03,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48422 conditions, 6854 events. 2300/6854 cut-off events. For 156979/156979 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68900 event pairs, 656 based on Foata normal form. 1/6755 useless extension candidates. Maximal degree in co-relation 48313. Up to 2132 conditions per place. [2022-07-13 22:12:03,411 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 485 selfloop transitions, 256 changer transitions 8/791 dead transitions. [2022-07-13 22:12:03,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 791 transitions, 14955 flow [2022-07-13 22:12:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:12:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:12:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-07-13 22:12:03,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-13 22:12:03,415 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-07-13 22:12:03,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-07-13 22:12:03,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:03,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-07-13 22:12:03,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:03,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:03,420 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:03,420 INFO L186 Difference]: Start difference. First operand has 406 places, 728 transitions, 12514 flow. Second operand 24 states and 1386 transitions. [2022-07-13 22:12:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 791 transitions, 14955 flow [2022-07-13 22:12:04,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 791 transitions, 14460 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-07-13 22:12:04,291 INFO L242 Difference]: Finished difference. Result has 432 places, 746 transitions, 12872 flow [2022-07-13 22:12:04,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12872, PETRI_PLACES=432, PETRI_TRANSITIONS=746} [2022-07-13 22:12:04,292 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 364 predicate places. [2022-07-13 22:12:04,292 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 746 transitions, 12872 flow [2022-07-13 22:12:04,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:04,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:04,293 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:04,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 22:12:04,493 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,SelfDestructingSolverStorable16 [2022-07-13 22:12:04,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1469113975, now seen corresponding path program 10 times [2022-07-13 22:12:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870084173] [2022-07-13 22:12:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:04,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:04,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870084173] [2022-07-13 22:12:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870084173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583130308] [2022-07-13 22:12:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:12:04,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:04,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:04,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:12:04,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:12:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:12:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:04,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583130308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:04,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:04,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:12:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603564193] [2022-07-13 22:12:04,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:04,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:12:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:04,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:12:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:12:04,785 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:12:04,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 746 transitions, 12872 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:04,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:04,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:12:04,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:09,861 INFO L129 PetriNetUnfolder]: 4589/12732 cut-off events. [2022-07-13 22:12:09,861 INFO L130 PetriNetUnfolder]: For 315191/315191 co-relation queries the response was YES. [2022-07-13 22:12:09,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92593 conditions, 12732 events. 4589/12732 cut-off events. For 315191/315191 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 139450 event pairs, 605 based on Foata normal form. 68/12686 useless extension candidates. Maximal degree in co-relation 92475. Up to 2088 conditions per place. [2022-07-13 22:12:10,058 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 588 selfloop transitions, 1197 changer transitions 38/1865 dead transitions. [2022-07-13 22:12:10,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1865 transitions, 36408 flow [2022-07-13 22:12:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-13 22:12:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-13 22:12:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-07-13 22:12:10,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-07-13 22:12:10,063 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-07-13 22:12:10,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-07-13 22:12:10,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:10,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-07-13 22:12:10,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:10,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:10,081 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:10,081 INFO L186 Difference]: Start difference. First operand has 432 places, 746 transitions, 12872 flow. Second operand 86 states and 4916 transitions. [2022-07-13 22:12:10,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1865 transitions, 36408 flow [2022-07-13 22:12:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1865 transitions, 35637 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-07-13 22:12:12,274 INFO L242 Difference]: Finished difference. Result has 535 places, 1518 transitions, 31372 flow [2022-07-13 22:12:12,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12563, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=31372, PETRI_PLACES=535, PETRI_TRANSITIONS=1518} [2022-07-13 22:12:12,275 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 467 predicate places. [2022-07-13 22:12:12,275 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1518 transitions, 31372 flow [2022-07-13 22:12:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:12,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:12,276 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:12,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:12,476 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,SelfDestructingSolverStorable17 [2022-07-13 22:12:12,476 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 798999983, now seen corresponding path program 11 times [2022-07-13 22:12:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:12,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771373852] [2022-07-13 22:12:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:12,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:12,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771373852] [2022-07-13 22:12:12,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771373852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016721906] [2022-07-13 22:12:12,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:12:12,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:12,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:12,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:12,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:12:12,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:12:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:12:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:12,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016721906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:12,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:12:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170876811] [2022-07-13 22:12:12,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:12:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:12:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:12:12,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:12:12,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1518 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:12,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:12,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:12:12,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:21,409 INFO L129 PetriNetUnfolder]: 6229/17182 cut-off events. [2022-07-13 22:12:21,410 INFO L130 PetriNetUnfolder]: For 600922/600922 co-relation queries the response was YES. [2022-07-13 22:12:21,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144730 conditions, 17182 events. 6229/17182 cut-off events. For 600922/600922 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 198013 event pairs, 856 based on Foata normal form. 7/17025 useless extension candidates. Maximal degree in co-relation 144588. Up to 3275 conditions per place. [2022-07-13 22:12:21,734 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 880 selfloop transitions, 1252 changer transitions 7/2181 dead transitions. [2022-07-13 22:12:21,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 2181 transitions, 49810 flow [2022-07-13 22:12:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 22:12:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 22:12:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3003 transitions. [2022-07-13 22:12:21,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-13 22:12:21,738 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3003 transitions. [2022-07-13 22:12:21,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3003 transitions. [2022-07-13 22:12:21,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:21,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3003 transitions. [2022-07-13 22:12:21,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.75) internal successors, (3003), 52 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:21,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:21,748 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:21,748 INFO L186 Difference]: Start difference. First operand has 535 places, 1518 transitions, 31372 flow. Second operand 52 states and 3003 transitions. [2022-07-13 22:12:21,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 2181 transitions, 49810 flow [2022-07-13 22:12:27,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 2181 transitions, 49000 flow, removed 309 selfloop flow, removed 26 redundant places. [2022-07-13 22:12:27,560 INFO L242 Difference]: Finished difference. Result has 576 places, 1948 transitions, 45824 flow [2022-07-13 22:12:27,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=30741, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=45824, PETRI_PLACES=576, PETRI_TRANSITIONS=1948} [2022-07-13 22:12:27,561 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 508 predicate places. [2022-07-13 22:12:27,561 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1948 transitions, 45824 flow [2022-07-13 22:12:27,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:27,562 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:27,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-13 22:12:27,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:27,763 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202161, now seen corresponding path program 12 times [2022-07-13 22:12:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538730889] [2022-07-13 22:12:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:27,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538730889] [2022-07-13 22:12:27,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538730889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:27,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953900315] [2022-07-13 22:12:27,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:12:27,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:27,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:27,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:27,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:12:27,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:12:27,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:12:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:27,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:28,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953900315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:28,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:28,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:12:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202216098] [2022-07-13 22:12:28,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:12:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:12:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:12:28,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:12:28,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1948 transitions, 45824 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:28,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:28,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:12:28,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:38,997 INFO L129 PetriNetUnfolder]: 6300/17709 cut-off events. [2022-07-13 22:12:38,997 INFO L130 PetriNetUnfolder]: For 761741/761741 co-relation queries the response was YES. [2022-07-13 22:12:39,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158591 conditions, 17709 events. 6300/17709 cut-off events. For 761741/761741 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 207546 event pairs, 998 based on Foata normal form. 7/17514 useless extension candidates. Maximal degree in co-relation 158436. Up to 2403 conditions per place. [2022-07-13 22:12:39,337 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 734 selfloop transitions, 1465 changer transitions 18/2259 dead transitions. [2022-07-13 22:12:39,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2259 transitions, 56612 flow [2022-07-13 22:12:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 22:12:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-13 22:12:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2022-07-13 22:12:39,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2022-07-13 22:12:39,341 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2022-07-13 22:12:39,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2022-07-13 22:12:39,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:39,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2022-07-13 22:12:39,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:39,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:39,355 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:39,356 INFO L186 Difference]: Start difference. First operand has 576 places, 1948 transitions, 45824 flow. Second operand 70 states and 4016 transitions. [2022-07-13 22:12:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2259 transitions, 56612 flow [2022-07-13 22:12:46,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2259 transitions, 55282 flow, removed 268 selfloop flow, removed 29 redundant places. [2022-07-13 22:12:46,826 INFO L242 Difference]: Finished difference. Result has 622 places, 2060 transitions, 51355 flow [2022-07-13 22:12:46,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=44573, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=51355, PETRI_PLACES=622, PETRI_TRANSITIONS=2060} [2022-07-13 22:12:46,829 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 554 predicate places. [2022-07-13 22:12:46,829 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 2060 transitions, 51355 flow [2022-07-13 22:12:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:46,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:46,830 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:46,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:47,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:47,053 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2008611189, now seen corresponding path program 13 times [2022-07-13 22:12:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:47,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954904618] [2022-07-13 22:12:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:47,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954904618] [2022-07-13 22:12:47,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954904618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004914152] [2022-07-13 22:12:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:12:47,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:47,116 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:47,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:12:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:12:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:47,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:47,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004914152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:47,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:47,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:12:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675435534] [2022-07-13 22:12:47,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:12:47,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:12:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:12:47,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:12:47,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2060 transitions, 51355 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:47,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:47,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:12:47,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:58,582 INFO L129 PetriNetUnfolder]: 6334/17500 cut-off events. [2022-07-13 22:12:58,582 INFO L130 PetriNetUnfolder]: For 820978/820978 co-relation queries the response was YES. [2022-07-13 22:12:59,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165044 conditions, 17500 events. 6334/17500 cut-off events. For 820978/820978 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 203258 event pairs, 799 based on Foata normal form. 45/17355 useless extension candidates. Maximal degree in co-relation 164882. Up to 3742 conditions per place. [2022-07-13 22:12:59,391 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 737 selfloop transitions, 1552 changer transitions 45/2376 dead transitions. [2022-07-13 22:12:59,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2376 transitions, 62124 flow [2022-07-13 22:12:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 22:12:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-13 22:12:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3929 transitions. [2022-07-13 22:12:59,396 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7395068699416526 [2022-07-13 22:12:59,396 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3929 transitions. [2022-07-13 22:12:59,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3929 transitions. [2022-07-13 22:12:59,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:59,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3929 transitions. [2022-07-13 22:12:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.94202898550725) internal successors, (3929), 69 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:59,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:59,409 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:59,409 INFO L186 Difference]: Start difference. First operand has 622 places, 2060 transitions, 51355 flow. Second operand 69 states and 3929 transitions. [2022-07-13 22:12:59,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2376 transitions, 62124 flow [2022-07-13 22:13:08,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 2376 transitions, 60226 flow, removed 214 selfloop flow, removed 49 redundant places. [2022-07-13 22:13:08,932 INFO L242 Difference]: Finished difference. Result has 644 places, 2127 transitions, 55652 flow [2022-07-13 22:13:08,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49404, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55652, PETRI_PLACES=644, PETRI_TRANSITIONS=2127} [2022-07-13 22:13:08,935 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 576 predicate places. [2022-07-13 22:13:08,935 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 2127 transitions, 55652 flow [2022-07-13 22:13:08,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:13:08,936 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:08,937 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:13:08,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 22:13:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:09,164 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:13:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1858528645, now seen corresponding path program 14 times [2022-07-13 22:13:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:09,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372135398] [2022-07-13 22:13:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:09,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:09,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372135398] [2022-07-13 22:13:09,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372135398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:13:09,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038112766] [2022-07-13 22:13:09,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:13:09,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:09,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:13:09,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:13:09,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:13:09,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:13:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:13:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:13:09,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:13:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:13:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:09,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038112766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:13:09,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:13:09,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-13 22:13:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740795651] [2022-07-13 22:13:09,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:13:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:13:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:13:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:13:09,452 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 22:13:09,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 2127 transitions, 55652 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:13:09,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:09,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 22:13:09,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand